| Aakia J. R. Grande | | a | | Aakia J. R. Grande | |
| Abola Adans. | Cinna L. | | | Abola Adans. | Cinna L. |
| Acamptoclados Nash | Eragrostis Wolf | | | Acamptoclados Nash | Eragrostis Wolf |
| Achaeta E. Fourn. | Calamagrostis Adans. | | | Achaeta E. Fourn. | Calamagrostis Adans. |
| Achlaena Griseb. | | a | | Achlaena Griseb. | |
| Achnatherum P. Beauv. | | a | | Achnatherum P. Beauv. | |
| ×Achnella Barkworth | | a | | Achnella Barkworth | |
| Achneria Munro ex Benth. & Hook. f. | Pentameris P. Beauv. | | | Achneria Munro ex Benth. & Hook. f. | Pentameris P. Beauv. |
| Achneria P. Beauv. | Eriachne R. Br. | | | Achneria P. Beauv. | Eriachne R. Br. |
| Achnodon Link | Phleum L. | | | Achnodon Link | Phleum L. |
| Achnodonton P. Beauv. | Phleum L. | | | Achnodonton P. Beauv. | Phleum L. |
| Achrochloa B. D. Jacks., orth. var. | Koeleria Pers. | | | Achrochloa B. D. Jacks., orth. var. | Koeleria Pers. |
| Achroostachys Benth., orth. var. | Athroostachys Benth. | | | Achroostachys Benth., orth. var. | Athroostachys Benth. |
| Achyrodes Boehm. | Lamarckia Moench | | | Achyrodes Boehm. | Lamarckia Moench |
| Aciachne Benth. | | a | | Aciachne Benth. | |
| Acicarpa Raddi | Digitaria Haller | | | Acicarpa Raddi | Digitaria Haller |
| Acidosasa C. D. Chu & C. S. Chao ex Keng f. | | a | | Acidosasa C. D. Chu & C. S. Chao ex Keng f. | |
| Aconisia J. R. Grande | | a | | Aconisia J. R. Grande | |
| Acostia Swallen | Panicum L. | | | Acostia Swallen | Panicum L. |
| Acrachne Wight & Arn. ex Chiov. | | a | | Acrachne Wight & Arn. ex Chiov. | |
| Acratherum Link | Arundinella Raddi | | | Acratherum Link | Arundinella Raddi |
| Acritochaete Pilg. | | a | | Acritochaete Pilg. | |
| Acroceras Stapf | | a | | Acroceras Stapf | |
| Acrochaete Peter | Setaria P. Beauv. | | | Acrochaete Peter | Setaria P. Beauv. |
| Acroelytrum Steud. | Lophatherum Brongn. | | | Acroelytrum Steud. | Lophatherum Brongn. |
| Acrospelion Steud. | Trisetum Pers. | | | Acrospelion Steud. | Trisetum Pers. |
| Acroxis Steud., nom. inval. | Muhlenbergia Schreb. | | | Acroxis Steud., nom. inval. | Muhlenbergia Schreb. |
| Actinochloa Roem. & Schult. | Bouteloua Lag. | | | Actinochloa Roem. & Schult. | Bouteloua Lag. |
| Actinochloris Steud., nom. inval. | Chloris Sw. | | | Actinochloris Steud., nom. inval. | Chloris Sw. |
| Actinocladum McClure ex Soderstr. | | a | | Actinocladum McClure ex Soderstr. | |
| Adenochloa Zuloaga | | a | | Adenochloa Zuloaga | |
| Aechmophora Steud., nom. inval. | Bromus L. | | | Aechmophora Steud., nom. inval. | Bromus L. |
| Aegialina Schult. | Rostraria Trin. | | | Aegialina Schult. | Rostraria Trin. |
| Aegialitis Trin. | Rostraria Trin. | | | Aegialitis Trin. | Rostraria Trin. |
| Aegicon Adans. | Aegilops L. | | | Aegicon Adans. | Aegilops L. |
| Aegilemma A. Love | Aegilops L. | | | Aegilemma A. Love | Aegilops L. |
| Aegilonearum A. Love | Aegilops L. | | | Aegilonearum A. Love | Aegilops L. |
| Aegilopodes A. Love | Aegilops L. | | | Aegilopodes A. Love | Aegilops L. |
| Aegilops L. | | a | | Aegilops L. | |
| Aegilops L. sect. Aegilops | | a | i | Aegilops L. sect. Aegilops | |
| Aegilops L. sect. Comopyrum | | a | i | Aegilops L. sect. Comopyrum | |
| Aegilops L. sect. Cylindropyrum | | a | i | Aegilops L. sect. Cylindropyrum | |
| Aegilops L. sect. Sitopsis | | a | i | Aegilops L. sect. Sitopsis | |
| Aegilops L. sect. Vertebrata | | a | i | Aegilops L. sect. Vertebrata | |
| ×Aegilotrichum Tscherm.-Seys., nom. inval. | ×Aegilotriticum P. Fourn. | | | Aegilotrichum Tscherm.-Seys., nom. inval. | Aegilotriticum P. Fourn. |
| ×Aegilotriticum P. Fourn. | | a | | Aegilotriticum P. Fourn. | |
| Aegopogon Humb. & Bonpl. ex Willd. | | a | | Aegopogon Humb. & Bonpl. ex Willd. | |
| Aelbroeckia De Moor | Aeluropus Trin. | | | Aelbroeckia De Moor | Aeluropus Trin. |
| Aeluropus Trin. | | a | | Aeluropus Trin. | |
| Aera Asch., orth. var. | Aira L. | | | Aera Asch., orth. var. | Aira L. |
| Aeropsis Asch. & Graebn. | Airopsis Desv. | | | Aeropsis Asch. & Graebn. | Airopsis Desv. |
| Aethonopogon Kuntze, nom. inval. | Polytrias Hack. | | | Aethonopogon Kuntze, nom. inval. | Polytrias Hack. |
| Afrachneria Sprague | Pentameris P. Beauv. | | | Afrachneria Sprague | Pentameris P. Beauv. |
| Afrotrichloris Chiov. | | a | | Afrotrichloris Chiov. | |
| Agenium Nees | | a | | Agenium Nees | |
| Aglycia Steud., nom. inval. | Eriochloa Kunth | | | Aglycia Steud., nom. inval. | Eriochloa Kunth |
| Agnesia Zuloaga & Judz. | | a | | Agnesia Zuloaga & Judz. | |
| Agraulus P. Beauv. | Agrostis L. | | | Agraulus P. Beauv. | Agrostis L. |
| Agrestis Bubani | Agrostis L. | | | Agrestis Bubani | Agrostis L. |
| ×Agroelymus E. G. Camus ex A. Camus | | a | | Agroelymus E. G. Camus ex A. Camus | |
| ×Agrohordeum E. G. Camus ex A. Camus | | a | | Agrohordeum E. G. Camus ex A. Camus | |
| ×Agropogon P. Fourn. | | a | | Agropogon P. Fourn. | |
| Agropyron Gaertn. | | a | | Agropyron Gaertn. | |
| Agropyropsis (Batt. & Trab.) A. Camus | | a | | Agropyropsis (Batt. & Trab.) A. Camus | |
| ×Agrositanion Bowden | ×Agroelymus E. G. Camus ex A. Camus | | | Agrositanion Bowden | Agroelymus E. G. Camus ex A. Camus |
| Agrosticula Raddi | Sporobolus R. Br. | | | Agrosticula Raddi | Sporobolus R. Br. |
| Agrostis L. | | a | | Agrostis L. | |
| Agrostomia Cerv. | Chloris Sw. | | | Agrostomia Cerv. | Chloris Sw. |
| Agrostopoa Davidse et al. | | a | | Agrostopoa Davidse et al. | |
| ×Agrotriticum Cif. & Giacom. | | a | | Agrotriticum Cif. & Giacom. | |
| Aikinia Wall. | Mnesithea Kunth | | | Aikinia Wall. | Mnesithea Kunth |
| Aira L. | | a | | Aira L. | |
| Airella (Dumort.) Dumort. | Aira L. | | | Airella (Dumort.) Dumort. | Aira L. |
| Airidium Steud. | Deschampsia P. Beauv. | | | Airidium Steud. | Deschampsia P. Beauv. |
| Airochloa Link | Koeleria Pers. | | | Airochloa Link | Koeleria Pers. |
| Airopsis Desv. | | a | | Airopsis Desv. | |
| Alectoridia A. Rich. | Arthraxon P. Beauv. | | | Alectoridia A. Rich. | Arthraxon P. Beauv. |
| Alexfloydia B. K. Simon | | a | | Alexfloydia B. K. Simon | |
| Allagostachyum Steud., nom. inval. | Tribolium Desv. | | | Allagostachyum Steud., nom. inval. | Tribolium Desv. |
| Allelotheca Steud. | Lophatherum Brongn. | | | Allelotheca Steud. | Lophatherum Brongn. |
| Alloeochaete C. E. Hubb. | | a | | Alloeochaete C. E. Hubb. | |
| Alloiatheros Raf. | Gymnopogon P. Beauv. | | | Alloiatheros Raf. | Gymnopogon P. Beauv. |
| Allolepis Soderstr. & H. F. Decker | | a | | Allolepis Soderstr. & H. F. Decker | |
| Alloteropsis J. Presl | | a | | Alloteropsis J. Presl | |
| Alopecuropsis Opiz | Alopecurus L. | | | Alopecuropsis Opiz | Alopecurus L. |
| Alopecurus L. | | a | | Alopecurus L. | |
| Altoparadisium Filg. et al. | | a | | Altoparadisium Filg. et al. | |
| Alvimia C. E. Calderon ex Soderstr. & Londono | | a | | Alvimia C. E. Calderon ex Soderstr. & Londono | |
| Alycia Steud., nom. inval. | Eriochloa Kunth | | | Alycia Steud., nom. inval. | Eriochloa Kunth |
| Amagris Raf. | Calamagrostis Adans. | | | Amagris Raf. | Calamagrostis Adans. |
| Amaxitis Adans. | Dactylis L. | | | Amaxitis Adans. | Dactylis L. |
| Amblyachyrum Steud. | Apocopis Nees | | | Amblyachyrum Steud. | Apocopis Nees |
| Amblychloa Link, nom. inval. | Sclerochloa P. Beauv. | | | Amblychloa Link, nom. inval. | Sclerochloa P. Beauv. |
| Amblyopyrum Eig | | a | | Amblyopyrum Eig | |
| Amblytes Dulac | Molinia Schrank | | | Amblytes Dulac | Molinia Schrank |
| Amelichloa Arriaga & Barkworth | | a | | Amelichloa Arriaga & Barkworth | |
| ×Ammocalamagrostis P. Fourn. | | a | | Ammocalamagrostis P. Fourn. | |
| Ammochloa Boiss. | | a | | Ammochloa Boiss. | |
| Ammophila Host | | a | | Ammophila Host | |
| Ampelocalamus S. L. Chen et al. | | a | | Ampelocalamus S. L. Chen et al. | |
| Ampelodesmos Link | | a | | Ampelodesmos Link | |
| Ampelodonax Lojac. | Ampelodesmos Link | | | Ampelodonax Lojac. | Ampelodesmos Link |
| Amphibromus Nees | | a | | Amphibromus Nees | |
| Amphicarpum Kunth | | a | | Amphicarpum Kunth | |
| Amphidonax Nees | Arundo L. | | | Amphidonax Nees | Arundo L. |
| Amphigenes Janka | Festuca L. | | | Amphigenes Janka | Festuca L. |
| Amphilophis (Trin.) Nash | Bothriochloa Kuntze | | | Amphilophis (Trin.) Nash | Bothriochloa Kuntze |
| Amphipogon R. Br. | | a | | Amphipogon R. Br. | |
| Amphochaeta Andersson | Pennisetum Rich. | | | Amphochaeta Andersson | Pennisetum Rich. |
| Anachortus V. Jirasek & Chrtek | Corynephorus P. Beauv. | | | Anachortus V. Jirasek & Chrtek | Corynephorus P. Beauv. |
| Anachyris Nees | Paspalum L. | | | Anachyris Nees | Paspalum L. |
| Anachyrium Steud., orth. var. | Paspalum L. | | | Anachyrium Steud., orth. var. | Paspalum L. |
| Anadelphia Hack. | | a | | Anadelphia Hack. | |
| Anastrophus Schltdl. | Axonopus P. Beauv. | | | Anastrophus Schltdl. | Axonopus P. Beauv. |
| Anatherostipa (Hack. ex Kuntze) Penail. | | a | | Anatherostipa (Hack. ex Kuntze) Penail. | |
| Anatherum P. Beauv. | Andropogon L. | | | Anatherum P. Beauv. | Andropogon L. |
| Anatherum Nabelek | Festuca L. | | | Anatherum Nabelek | Festuca L. |
| Ancistrachne S. T. Blake | | a | | Ancistrachne S. T. Blake | |
| Ancistragrostis S. T. Blake | Calamagrostis Adans. | | | Ancistragrostis S. T. Blake | Calamagrostis Adans. |
| Ancistrochloa Honda | Calamagrostis Adans. | | | Ancistrochloa Honda | Calamagrostis Adans. |
| Andropogon L. | | a | | Andropogon L. | |
| Andropterum Stapf | | a | | Andropterum Stapf | |
| Androscepia Brongn. | Themeda Forssk. | | | Androscepia Brongn. | Themeda Forssk. |
| Anelytrum Hack. | Avena L. | | | Anelytrum Hack. | Avena L. |
| Anemagrostis Trin. | Apera Adans. | | | Anemagrostis Trin. | Apera Adans. |
| Anemanthele Veldkamp | | a | | Anemanthele Veldkamp | |
| Aneurolepidium Nevski | Leymus Hochst. | | | Aneurolepidium Nevski | Leymus Hochst. |
| Anisachne Keng | Calamagrostis Adans. | | | Anisachne Keng | Calamagrostis Adans. |
| Anisantha K. Koch | Bromus L. | | | Anisantha K. Koch | Bromus L. |
| Aniselytron Merr. | | a | | Aniselytron Merr. | |
| Anisopogon R. Br. | | a | | Anisopogon R. Br. | |
| Anisopyrum (Griseb.) Gren. & Duval, nom. inval. | Leymus Hochst. | | | Anisopyrum (Griseb.) Gren. & Duval, nom. inval. | Leymus Hochst. |
| Anomalotis Steud. | Agrostis L. | | | Anomalotis Steud. | Agrostis L. |
| Anomochloa Brongn. | | a | | Anomochloa Brongn. | |
| Anoplia Steud., nom. inval. | Leptochloa P. Beauv. | | | Anoplia Steud., nom. inval. | Leptochloa P. Beauv. |
| Anthaenantia P. Beauv., orth. var. | Anthenantia P. Beauv. | | | Anthaenantia P. Beauv., orth. var. | Anthenantia P. Beauv. |
| Anthaenantiopsis Mez ex Pilg. | | a | | Anthaenantiopsis Mez ex Pilg. | |
| Anthenantia P. Beauv. | | a | | Anthenantia P. Beauv. | |
| Anthephora Schreb. | | a | | Anthephora Schreb. | |
| Anthipsimus Raf. | Muhlenbergia Schreb. | | | Anthipsimus Raf. | Muhlenbergia Schreb. |
| Anthistiria L. f. | Themeda Forssk. | | | Anthistiria L. f. | Themeda Forssk. |
| Anthochloa Nees & Meyen | | a | | Anthochloa Nees & Meyen | |
| Anthopogon Nutt. | Gymnopogon P. Beauv. | | | Anthopogon Nutt. | Gymnopogon P. Beauv. |
| Anthosachne Steud. | | a | | Anthosachne Steud. | |
| Anthoxanthum L. | | a | | Anthoxanthum L. | |
| Antichloa Steud., nom. inval. | Bouteloua Lag. | | | Antichloa Steud., nom. inval. | Bouteloua Lag. |
| Antinoria Parl. | | a | | Antinoria Parl. | |
| Antitragus Gaertn. | Crypsis Aiton | | | Antitragus Gaertn. | Crypsis Aiton |
| Antonella Caro | Tridens Roem. & Schult. | | | Antonella Caro | Tridens Roem. & Schult. |
| Antoschmidtia Boiss. | Schmidtia Steud. ex J. A. Schmidt | | | Antoschmidtia Boiss. | Schmidtia Steud. ex J. A. Schmidt |
| Apera Adans. | | a | | Apera Adans. | |
| Aphanelytrum Hack. | | a | | Aphanelytrum Hack. | |
| Aplexia Raf. | Leersia Sw. | | | Aplexia Raf. | Leersia Sw. |
| Aplocera Raf., nom. inval. | Ctenium Panz. | | | Aplocera Raf., nom. inval. | Ctenium Panz. |
| Apluda L. | | a | | Apluda L. | |
| Apochaete (C. E. Hubb.) J. B. Phipps | Tristachya Nees | | | Apochaete (C. E. Hubb.) J. B. Phipps | Tristachya Nees |
| Apochiton C. E. Hubb. | | a | | Apochiton C. E. Hubb. | |
| Apochloa Zuloaga & Morrone | | a | | Apochloa Zuloaga & Morrone | |
| Apoclada McClure | | a | | Apoclada McClure | |
| Apocopis Nees | | a | | Apocopis Nees | |
| Apogon Steud., nom. inval. | Chloris Sw. | | | Apogon Steud., nom. inval. | Chloris Sw. |
| Apogonia (Nutt.) E. Fourn. | Mnesithea Kunth | | | Apogonia (Nutt.) E. Fourn. | Mnesithea Kunth |
| Arberella Soderstr. & C. E. Calderon | | a | | Arberella Soderstr. & C. E. Calderon | |
| Arcangelina Kuntze | Tripogon Roem. & Schult. | | | Arcangelina Kuntze | Tripogon Roem. & Schult. |
| Arctagrostis Griseb. | | a | | Arctagrostis Griseb. | |
| Arctophila (Rupr.) Andersson | | a | | Arctophila (Rupr.) Andersson | |
| Arctopoa (Griseb.) Prob. | Poa L. | | | Arctopoa (Griseb.) Prob. | Poa L. |
| Argillochloa W. A. Weber | Festuca L. | | | Argillochloa W. A. Weber | Festuca L. |
| Argopogon Mimeur | Ischaemum L. | | | Argopogon Mimeur | Ischaemum L. |
| Aristaria Jungh. | Themeda Forssk. | | | Aristaria Jungh. | Themeda Forssk. |
| Aristavena F. Albers & Butzin | Deschampsia P. Beauv. | | | Aristavena F. Albers & Butzin | Deschampsia P. Beauv. |
| Aristella (Trin.) Bertol. | Achnatherum P. Beauv. | | | Aristella (Trin.) Bertol. | Achnatherum P. Beauv. |
| Aristida L. | | a | | Aristida L. | |
| Aristidium (Endl.) Lindl. | Bouteloua Lag. | | | Aristidium (Endl.) Lindl. | Bouteloua Lag. |
| Aristopsis Catasus | Aristida L. | | | Aristopsis Catasus | Aristida L. |
| Arrhenatherum P. Beauv. | | a | | Arrhenatherum P. Beauv. | |
| Arrozia Schrad. ex Kunth | Luziola Juss. | | | Arrozia Schrad. ex Kunth | Luziola Juss. |
| Arthragrostis Lazarides | | a | | Arthragrostis Lazarides | |
| Arthratherum P. Beauv. | Aristida L. | | | Arthratherum P. Beauv. | Aristida L. |
| Arthraxon P. Beauv. | | a | | Arthraxon P. Beauv. | |
| Arthrochlaena Benth., nom. inval. | Sclerodactylon Stapf | | | Arthrochlaena Benth., nom. inval. | Sclerodactylon Stapf |
| Arthrochloa J. W. Lorch | Acrachne Wight & Arn. ex Chiov. | | | Arthrochloa J. W. Lorch | Acrachne Wight & Arn. ex Chiov. |
| Arthrochloa R. Br. | Holcus L. | | | Arthrochloa R. Br. | Holcus L. |
| Arthrochortus Lowe | Lolium L. | | | Arthrochortus Lowe | Lolium L. |
| Arthrolophis (Trin.) Chiov. | Andropogon L. | | | Arthrolophis (Trin.) Chiov. | Andropogon L. |
| Arthropogon Nees | | a | | Arthropogon Nees | |
| Arthrostachya Link | Gaudinia P. Beauv. | | | Arthrostachya Link | Gaudinia P. Beauv. |
| Arthrostachys Desv. | Andropogon L. | | | Arthrostachys Desv. | Andropogon L. |
| Arthrostylidium Rupr. | | a | | Arthrostylidium Rupr. | |
| Arundarbor Kuntze | Bambusa Schreb. | | | Arundarbor Kuntze | Bambusa Schreb. |
| Arundinaria Michx. | | a | | Arundinaria Michx. | |
| Arundinella Raddi | | a | | Arundinella Raddi | |
| Arundo L. | | a | | Arundo L. | |
| Arundoclaytonia Davidse & R. P. Ellis | | a | | Arundoclaytonia Davidse & R. P. Ellis | |
| Asperella Humb. | Elymus L. | | | Asperella Humb. | Elymus L. |
| Asprella Schreb. | Leersia Sw. | | | Asprella Schreb. | Leersia Sw. |
| Asprella Host | Psilurus Trin. | | | Asprella Host | Psilurus Trin. |
| Aspris Adans. | Aira L. | | | Aspris Adans. | Aira L. |
| Asthenatherum Nevski | Centropodia (R. Br.) Rchb. | | | Asthenatherum Nevski | Centropodia (R. Br.) Rchb. |
| Asthenochloa Buse | | a | | Asthenochloa Buse | |
| Astrebla F. Muell. ex Benth. | | a | | Astrebla F. Muell. ex Benth. | |
| Ataxia R. Br. | Anthoxanthum L. | | | Ataxia R. Br. | Anthoxanthum L. |
| Athernotus Dulac | Calamagrostis Adans. | | | Athernotus Dulac | Calamagrostis Adans. |
| Atherophora Steud., nom. inval. | Aegopogon Humb. & Bonpl. ex Willd. | | | Atherophora Steud., nom. inval. | Aegopogon Humb. & Bonpl. ex Willd. |
| Atheropogon Muhl. ex Willd. | Bouteloua Lag. | | | Atheropogon Muhl. ex Willd. | Bouteloua Lag. |
| Athrolophis (Trin.) Chiov., orth. var. | Andropogon L. | | | Athrolophis (Trin.) Chiov., orth. var. | Andropogon L. |
| Athroostachys Benth. | | a | | Athroostachys Benth. | |
| Atractantha McClure | | a | | Atractantha McClure | |
| Atractocarpa Franch. | Puelia Franch. | | | Atractocarpa Franch. | Puelia Franch. |
| Atropis (Trin.) Griseb. | Puccinellia Parl. | | | Atropis (Trin.) Griseb. | Puccinellia Parl. |
| Aulacolepis Hack. | Calamagrostis Adans. | | | Aulacolepis Hack. | Calamagrostis Adans. |
| Aulaxanthus Elliott | Anthenantia P. Beauv. | | | Aulaxanthus Elliott | Anthenantia P. Beauv. |
| Aulaxia Nutt. | Anthenantia P. Beauv. | | | Aulaxia Nutt. | Anthenantia P. Beauv. |
| Aulonemia Goudot | | a | | Aulonemia Goudot | |
| Australopyrum (Tzvelev) A. Love | | a | | Australopyrum (Tzvelev) A. Love | |
| Austrochloris Lazarides | | a | | Austrochloris Lazarides | |
| Austrodanthonia H. P. Linder | Rytidosperma Steud. | | | Austrodanthonia H. P. Linder | Rytidosperma Steud. |
| Austroderia N. P. Barker & H. P. Linder | | a | | Austroderia N. P. Barker & H. P. Linder | |
| Austrofestuca (Tzvelev) E. B. Alexeev | | a | | Austrofestuca (Tzvelev) E. B. Alexeev | |
| Austrostipa S. W. L. Jacobs & J. Everett | | a | | Austrostipa S. W. L. Jacobs & J. Everett | |
| Avellinia Parl. | | a | | Avellinia Parl. | |
| Avena L. | | a | | Avena L. | |
| Avena Scop. | Lagurus L. | | | Avena Scop. | Lagurus L. |
| Avenaria Heist. ex Fabr. | Bromus L. | | | Avenaria Heist. ex Fabr. | Bromus L. |
| Avenastrum Opiz | Helictotrichon Besser | | | Avenastrum Opiz | Helictotrichon Besser |
| Avenella Parl. | | a | | Avenella Parl. | |
| Avenochloa Holub | Helictochloa Romero Zarco | | | Avenochloa Holub | Helictochloa Romero Zarco |
| Avenula (Dumort.) Dumort. | | a | | Avenula (Dumort.) Dumort. | |
| Axonopus P. Beauv. | | a | | Axonopus P. Beauv. | |
| Balansochloa Kuntze | Germainia Balansa & Poitr. | | | Balansochloa Kuntze | Germainia Balansa & Poitr. |
| Baldingera G. Gaertn. et al. | Phalaris L. | | | Baldingera G. Gaertn. et al. | Phalaris L. |
| Baldomiria Herter | Leptochloa P. Beauv. | | | Baldomiria Herter | Leptochloa P. Beauv. |
| Bambos Retz. | Bambusa Schreb. | | | Bambos Retz. | Bambusa Schreb. |
| Bambus J. F. Gmel. | Bambusa Schreb. | | | Bambus J. F. Gmel. | Bambusa Schreb. |
| Bambusa Schreb. | | a | | Bambusa Schreb. | |
| Baptorhachis Clayton & Renvoize | | a | | Baptorhachis Clayton & Renvoize | |
| Bashania Keng f. & T. P. Yi | Arundinaria Michx. | | | Bashania Keng f. & T. P. Yi | Arundinaria Michx. |
| Batratherum Nees | Arthraxon P. Beauv. | | | Batratherum Nees | Arthraxon P. Beauv. |
| Bauchea E. Fourn. | Sporobolus R. Br. | | | Bauchea E. Fourn. | Sporobolus R. Br. |
| Bealia Scribn. | | a | | Bealia Scribn. | |
| Beckera Fresen. | Snowdenia C. E. Hubb. | | | Beckera Fresen. | Snowdenia C. E. Hubb. |
| Beckeria Bernh. | Melica L. | | | Beckeria Bernh. | Melica L. |
| Beckeropsis Fig. & De Not. | Pennisetum Rich. | | | Beckeropsis Fig. & De Not. | Pennisetum Rich. |
| Beckmannia Host | | a | | Beckmannia Host | |
| Beesha Kunth, nom. inval. | Melocanna Trin. | | | Beesha Kunth, nom. inval. | Melocanna Trin. |
| Beesha Munro, nom. inval. | Ochlandra Thwaites | | | Beesha Munro, nom. inval. | Ochlandra Thwaites |
| Bellardiochloa Chiov. | | a | | Bellardiochloa Chiov. | |
| Bennetia Raf. | Sporobolus R. Br. | | | Bennetia Raf. | Sporobolus R. Br. |
| Berchtoldia C. Presl | Chaetium Nees | | | Berchtoldia C. Presl | Chaetium Nees |
| Bergbambos Stapleton | | a | | Bergbambos Stapleton | |
| Berghausia Endl. | Garnotia Brongn. | | | Berghausia Endl. | Garnotia Brongn. |
| Bewsia Gooss. | | a | | Bewsia Gooss. | |
| Bhidea Stapf ex Bor | | a | | Bhidea Stapf ex Bor | |
| Biatherium Desv. | Gymnopogon P. Beauv. | | | Biatherium Desv. | Gymnopogon P. Beauv. |
| Bifaria (Hack.) Kuntze | Mesosetum Steud. | | | Bifaria (Hack.) Kuntze | Mesosetum Steud. |
| Blakeochloa Veldkamp | Plinthanthesis Steud. | | | Blakeochloa Veldkamp | Plinthanthesis Steud. |
| Blepharidachne Hack. | | a | | Blepharidachne Hack. | |
| Blepharochloa Endl. | Leersia Sw. | | | Blepharochloa Endl. | Leersia Sw. |
| Blepharoneuron Nash | | a | | Blepharoneuron Nash | |
| Bluffia Nees | Alloteropsis J. Presl | | | Bluffia Nees | Alloteropsis J. Presl |
| Blumenbachia Koeler | Sorghum Moench | | | Blumenbachia Koeler | Sorghum Moench |
| Blyttia Fr. | Cinna L. | | | Blyttia Fr. | Cinna L. |
| Boissiera Hochst. ex Steud. | | a | | Boissiera Hochst. ex Steud. | |
| Boivinella A. Camus | Cyphochlaena Hack. | | | Boivinella A. Camus | Cyphochlaena Hack. |
| Bonia Balansa | | a | | Bonia Balansa | |
| Borinda Stapleton | | a | | Borinda Stapleton | |
| Boriskellera Terechov | Eragrostis Wolf | | | Boriskellera Terechov | Eragrostis Wolf |
| Botelua Lag., orth. var. | Bouteloua Lag. | | | Botelua Lag., orth. var. | Bouteloua Lag. |
| Bothriochloa Kuntze | | a | | Bothriochloa Kuntze | |
| Bouteloua Lag. | | a | | Bouteloua Lag. | |
| Bouteloua Lag. sect. Barbata | | a | i | Bouteloua Lag. sect. Barbata | |
| Bouteloua Lag. sect. Bouteloua | | a | i | Bouteloua Lag. sect. Bouteloua | |
| Bouteloua Lag. sect. Buchloe | | a | i | Bouteloua Lag. sect. Buchloe | |
| Bouteloua Lag. sect. Chondrosum | | a | i | Bouteloua Lag. sect. Chondrosum | |
| Bouteloua Lag. sect. Cyclostachya | | a | i | Bouteloua Lag. sect. Cyclostachya | |
| Bouteloua Lag. sect. Hirsuta | | a | i | Bouteloua Lag. sect. Hirsuta | |
| Bouteloua Lag. sect. Hirsuta subs. Eriopoda | | a | i | Bouteloua Lag. sect. Hirsuta subs. Eriopoda | |
| Bouteloua Lag. sect. Hirsuta subs. Hirsuta | | a | i | Bouteloua Lag. sect. Hirsuta subs. Hirsuta | |
| Bouteloua Lag. sect. Opizia | | a | i | Bouteloua Lag. sect. Opizia | |
| Bouteloua Lag. sect. Triathera | | a | i | Bouteloua Lag. sect. Triathera | |
| Bouteloua Lag. sect. Trifida | | a | i | Bouteloua Lag. sect. Trifida | |
| Brachatera Desv. | Danthonia DC. | | | Brachatera Desv. | Danthonia DC. |
| Brachiaria (Trin.) Griseb. | | a | | Brachiaria (Trin.) Griseb. | |
| Brachyachne (Benth.) Stapf | | a | | Brachyachne (Benth.) Stapf | |
| Brachyathera Kuntze, nom. inval. | Danthonia DC. | | | Brachyathera Kuntze, nom. inval. | Danthonia DC. |
| Brachychloa S. M. Phillips | | a | | Brachychloa S. M. Phillips | |
| Brachyelytrum P. Beauv. | | a | | Brachyelytrum P. Beauv. | |
| Brachypodium P. Beauv. | | a | | Brachypodium P. Beauv. | |
| Brachystachyum Keng | | a | | Brachystachyum Keng | |
| Brachystylus Dulac | Koeleria Pers. | | | Brachystylus Dulac | Koeleria Pers. |
| Braconotia Godr. | Elymus L. | | | Braconotia Godr. | Elymus L. |
| Bracteola Swallen, nom. inval. | Chrysochloa Swallen | | | Bracteola Swallen, nom. inval. | Chrysochloa Swallen |
| Brandtia Kunth | Arundinella Raddi | | | Brandtia Kunth | Arundinella Raddi |
| Brasilocalamus Nakai | Merostachys Spreng. | | | Brasilocalamus Nakai | Merostachys Spreng. |
| Brevipodium A. Love & D. Love | Brachypodium P. Beauv. | | | Brevipodium A. Love & D. Love | Brachypodium P. Beauv. |
| Briza L. | | a | | Briza L. | |
| Brizochloa V. Jirasek & Chrtek | Briza L. | | | Brizochloa V. Jirasek & Chrtek | Briza L. |
| Brizopyrum Link | Desmazeria Dumort. | | | Brizopyrum Link | Desmazeria Dumort. |
| Brizopyrum Stapf | Tribolium Desv. | | | Brizopyrum Stapf | Tribolium Desv. |
| Bromelica (Thurb.) Farw. | Melica L. | | | Bromelica (Thurb.) Farw. | Melica L. |
| Bromidium Nees & Meyen | Agrostis L. | | | Bromidium Nees & Meyen | Agrostis L. |
| Bromopsis (Dumort.) Fourr. | Bromus L. | | | Bromopsis (Dumort.) Fourr. | Bromus L. |
| Bromuniola Stapf & C. E. Hubb. | | a | | Bromuniola Stapf & C. E. Hubb. | |
| Bromus L. | | a | | Bromus L. | |
| Bromus L. sect. Bromopsis | Bromus L. subg. Festucoides | | i | Bromus L. sect. Bromopsis | Bromus L. subg. Festucoides |
| Bromus L. sect. Genea | Bromus L. subg. Stenobromus | | i | Bromus L. sect. Genea | Bromus L. subg. Stenobromus |
| Bromus L. sect. Pnigma | Bromus L. subg. Bromus | | i | Bromus L. sect. Pnigma | Bromus L. subg. Bromus |
| Bromus L. subg. Bromus | | a | i | Bromus L. subg. Bromus | |
| Bromus L. subg. Ceratochloa | | a | i | Bromus L. subg. Ceratochloa | |
| Bromus L. subg. Festucoides | | a | i | Bromus L. subg. Festucoides | |
| Bromus L. subg. Neobromus | | a | i | Bromus L. subg. Neobromus | |
| Bromus L. subg. Nevskiella | | a | i | Bromus L. subg. Nevskiella | |
| Bromus L. subg. Stenobromus | | a | i | Bromus L. subg. Stenobromus | |
| Bromus Scop., nom. inval. | Triticum L. | | | Bromus Scop., nom. inval. | Triticum L. |
| Brousemichea Balansa | Zoysia Willd. | | | Brousemichea Balansa | Zoysia Willd. |
| Bruchmannia Nutt., orth. var. | Beckmannia Host | | | Bruchmannia Nutt., orth. var. | Beckmannia Host |
| Brylkinia F. Schmidt | | a | | Brylkinia F. Schmidt | |
| Bucetum Parn. | Festuca L. | | | Bucetum Parn. | Festuca L. |
| Buchloe Engelm. | Bouteloua Lag. | | | Buchloe Engelm. | Bouteloua Lag. |
| Buchlomimus Reeder et al. | Bouteloua Lag. | | | Buchlomimus Reeder et al. | Bouteloua Lag. |
| Buergersiochloa Pilg. | | a | | Buergersiochloa Pilg. | |
| Bulbilis Raf. ex Kuntze | Bouteloua Lag. | | | Bulbilis Raf. ex Kuntze | Bouteloua Lag. |
| Bulbulus Swallen, nom. inval. | Rehia Fijten | | | Bulbulus Swallen, nom. inval. | Rehia Fijten |
| Burmabambus Keng f. | Yushania Keng f. | | | Burmabambus Keng f. | Yushania Keng f. |
| Butania Keng f. | Yushania Keng f. | | | Butania Keng f. | Yushania Keng f. |
| Cabrera Lag. | Axonopus P. Beauv. | | | Cabrera Lag. | Axonopus P. Beauv. |
| Calamagrostis Adans. | | a | | Calamagrostis Adans. | |
| Calamina P. Beauv. | Apluda L. | | | Calamina P. Beauv. | Apluda L. |
| Calamochloa E. Fourn. | Sohnsia Airy Shaw | | | Calamochloa E. Fourn. | Sohnsia Airy Shaw |
| Calamochloe Rchb. | Arundinella Raddi | | | Calamochloe Rchb. | Arundinella Raddi |
| Calamovilfa (A. Gray) Hack. | | a | | Calamovilfa (A. Gray) Hack. | |
| Calanthera Hook., nom. inval. | Bouteloua Lag. | | | Calanthera Hook., nom. inval. | Bouteloua Lag. |
| Calderonella Soderstr. & H. F. Decker | Zeugites P. Browne | | | Calderonella Soderstr. & H. F. Decker | Zeugites P. Browne |
| Callichloea Steud., nom. inval. | Elionurus Humb. & Bonpl. ex Willd. | | | Callichloea Steud., nom. inval. | Elionurus Humb. & Bonpl. ex Willd. |
| Calochloa Kunze, nom. inval. | Elionurus Humb. & Bonpl. ex Willd. | | | Calochloa Kunze, nom. inval. | Elionurus Humb. & Bonpl. ex Willd. |
| Calosteca Desv. | Briza L. | | | Calosteca Desv. | Briza L. |
| Calotheca P. Beauv., orth. var. | Briza L. | | | Calotheca P. Beauv., orth. var. | Briza L. |
| Calotheria Steud., nom. inval. | Enneapogon Desv. ex P. Beauv. | | | Calotheria Steud., nom. inval. | Enneapogon Desv. ex P. Beauv. |
| Calycodon Nutt. | Muhlenbergia Schreb. | | | Calycodon Nutt. | Muhlenbergia Schreb. |
| Calyptochloa C. E. Hubb. | | a | | Calyptochloa C. E. Hubb. | |
| Cambajuva P. L. Viana et al. | | a | | Cambajuva P. L. Viana et al. | |
| Campeiostachys Drobow | Elymus L. | | | Campeiostachys Drobow | Elymus L. |
| Campelia Kunth, orth. var. | Deschampsia P. Beauv. | | | Campelia Kunth, orth. var. | Deschampsia P. Beauv. |
| Campella Link | Deschampsia P. Beauv. | | | Campella Link | Deschampsia P. Beauv. |
| Campuloa Desv., orth. var. | Ctenium Panz. | | | Campuloa Desv., orth. var. | Ctenium Panz. |
| Campulosus Desv. | Ctenium Panz. | | | Campulosus Desv. | Ctenium Panz. |
| Camusia J. W. Lorch | Acrachne Wight & Arn. ex Chiov. | | | Camusia J. W. Lorch | Acrachne Wight & Arn. ex Chiov. |
| Camusiella Bosser | Setaria P. Beauv. | | | Camusiella Bosser | Setaria P. Beauv. |
| Canastra Morrone et al. | | a | | Canastra Morrone et al. | |
| Candollea Steud. | Agrostis L. | | | Candollea Steud. | Agrostis L. |
| Capeochloa H. P. Linder & N. P. Barker | | a | | Capeochloa H. P. Linder & N. P. Barker | |
| Capillipedium Stapf | | a | | Capillipedium Stapf | |
| Capriola Adans. | Cynodon Rich. | | | Capriola Adans. | Cynodon Rich. |
| Caryochloa Trin. | Luziola Juss. | | | Caryochloa Trin. | Luziola Juss. |
| Caryochloa Spreng. | Piptochaetium J. Presl | | | Caryochloa Spreng. | Piptochaetium J. Presl |
| Caryophyllea Opiz | Aira L. | | | Caryophyllea Opiz | Aira L. |
| Casiostega Galeotti, nom. inval. | Bouteloua Lag. | | | Casiostega Galeotti, nom. inval. | Bouteloua Lag. |
| Castellia Tineo | | a | | Castellia Tineo | |
| Catabrosa P. Beauv. | | a | | Catabrosa P. Beauv. | |
| Catabrosella (Tzvelev) Tzvelev | | a | | Catabrosella (Tzvelev) Tzvelev | |
| Catalepis Stapf & Stent | | a | | Catalepis Stapf & Stent | |
| Catapodium Link | | a | | Catapodium Link | |
| Catatherophora Steud. | Pennisetum Rich. | | | Catatherophora Steud. | Pennisetum Rich. |
| Cathariostachys S. Dransf. | | a | | Cathariostachys S. Dransf. | |
| Cathestecum J. Presl | Bouteloua Lag. | | | Cathestecum J. Presl | Bouteloua Lag. |
| Celtica F. M. Vazquez & Barkworth | | a | | Celtica F. M. Vazquez & Barkworth | |
| Cenchropsis Nash | Cenchrus L. | | | Cenchropsis Nash | Cenchrus L. |
| Cenchrus L. | | a | | Cenchrus L. | |
| Centosteca Desv., orth. var. | Centotheca Desv. | | | Centosteca Desv., orth. var. | Centotheca Desv. |
| Centotheca Desv. | | a | | Centotheca Desv. | |
| Centrochloa Swallen | | a | | Centrochloa Swallen | |
| Centrophorum Trin. | Chrysopogon Trin. | | | Centrophorum Trin. | Chrysopogon Trin. |
| Centropodia (R. Br.) Rchb. | | a | | Centropodia (R. Br.) Rchb. | |
| Cephalochloa Coss. & Durieu, nom. inval. | Ammochloa Boiss. | | | Cephalochloa Coss. & Durieu, nom. inval. | Ammochloa Boiss. |
| Cephalostachyum Munro | | a | | Cephalostachyum Munro | |
| Ceratochaete Lunell | Zizania L. | | | Ceratochaete Lunell | Zizania L. |
| Ceratochloa P. Beauv. | Bromus L. | | | Ceratochloa P. Beauv. | Bromus L. |
| Cerea Schltdl. | Paspalum L. | | | Cerea Schltdl. | Paspalum L. |
| Ceresia Pers. | Paspalum L. | | | Ceresia Pers. | Paspalum L. |
| Ceytosis Munro, nom. inval. | Crypsis Aiton | | | Ceytosis Munro, nom. inval. | Crypsis Aiton |
| Chaboissaea E. Fourn. | | a | | Chaboissaea E. Fourn. | |
| Chaetaria P. Beauv. | Aristida L. | | | Chaetaria P. Beauv. | Aristida L. |
| Chaetium Nees | | a | | Chaetium Nees | |
| Chaetobromus Nees | | a | | Chaetobromus Nees | |
| Chaetochloa Scribn. | Setaria P. Beauv. | | | Chaetochloa Scribn. | Setaria P. Beauv. |
| Chaetopoa C. E. Hubb. | | a | | Chaetopoa C. E. Hubb. | |
| Chaetopogon Janch. | | a | | Chaetopogon Janch. | |
| Chaetostichium C. E. Hubb. | Oropetium Trin. | | | Chaetostichium C. E. Hubb. | Oropetium Trin. |
| Chaetotropis Kunth | Polypogon Desf. | | | Chaetotropis Kunth | Polypogon Desf. |
| Chaeturus Link | Chaetopogon Janch. | | | Chaeturus Link | Chaetopogon Janch. |
| Chalcoelytrum Lunell | Chrysopogon Trin. | | | Chalcoelytrum Lunell | Chrysopogon Trin. |
| Chalynochlamys Franch., nom. inval. | Arundinella Raddi | | | Chalynochlamys Franch., nom. inval. | Arundinella Raddi |
| Chamaecalamus Meyen | Calamagrostis Adans. | | | Chamaecalamus Meyen | Calamagrostis Adans. |
| Chamaedactylis T. Nees | Aeluropus Trin. | | | Chamaedactylis T. Nees | Aeluropus Trin. |
| Chamaeraphis R. Br. | | a | | Chamaeraphis R. Br. | |
| Chamagrostis Borkh. | Mibora Adans. | | | Chamagrostis Borkh. | Mibora Adans. |
| Chandrasekharania V. J. Nair et al. | | a | | Chandrasekharania V. J. Nair et al. | |
| Chascolytrum Desv. | Briza L. | | | Chascolytrum Desv. | Briza L. |
| Chasea Nieuwl., nom. inval. | Panicum L. | | | Chasea Nieuwl., nom. inval. | Panicum L. |
| Chasechloa A. Camus | Echinolaena Desv. | | | Chasechloa A. Camus | Echinolaena Desv. |
| Chasmanthium Link | | a | | Chasmanthium Link | |
| Chasmopodium Stapf | | a | | Chasmopodium Stapf | |
| Chauvinia Steud. | Spartina Schreb. | | | Chauvinia Steud. | Spartina Schreb. |
| Chennapyrum A. Love | Aegilops L. | | | Chennapyrum A. Love | Aegilops L. |
| Chevalierella A. Camus | | a | | Chevalierella A. Camus | |
| Chikusichloa Koidz. | | a | | Chikusichloa Koidz. | |
| Chilochloa P. Beauv. | Phleum L. | | | Chilochloa P. Beauv. | Phleum L. |
| Chimaerochloa H. P. Linder | | a | | Chimaerochloa H. P. Linder | |
| Chimonobambusa Makino | | a | | Chimonobambusa Makino | |
| Chimonocalamus J. R. Xue & T. P. Yi | | a | | Chimonocalamus J. R. Xue & T. P. Yi | |
| Chionachne R. Br. | | a | | Chionachne R. Br. | |
| Chionochloa Zotov | | a | | Chionochloa Zotov | |
| Chloachne Stapf | Poecilostachys Hack. | | | Chloachne Stapf | Poecilostachys Hack. |
| Chloammia Raf. | Vulpia C. C. Gmel. | | | Chloammia Raf. | Vulpia C. C. Gmel. |
| Chloothamnus Buse | Nastus Juss. | | | Chloothamnus Buse | Nastus Juss. |
| Chloridion Stapf | Stereochlaena Hack. | | | Chloridion Stapf | Stereochlaena Hack. |
| Chloridopsis Hack., nom. inval. | Trichloris E. Fourn. ex Benth. | | | Chloridopsis Hack., nom. inval. | Trichloris E. Fourn. ex Benth. |
| Chloris Sw. | | a | | Chloris Sw. | |
| Chlorocalymma Clayton | | a | | Chlorocalymma Clayton | |
| Chloroides Regel, nom. inval. | Eustachys Desv. | | | Chloroides Regel, nom. inval. | Eustachys Desv. |
| Chloropsis Hack. ex Kuntze | Trichloris E. Fourn. ex Benth. | | | Chloropsis Hack. ex Kuntze | Trichloris E. Fourn. ex Benth. |
| Chlorostis Raf. | Chloris Sw. | | | Chlorostis Raf. | Chloris Sw. |
| Chondrachyrum Nees | Briza L. | | | Chondrachyrum Nees | Briza L. |
| Chondrochlaena Kuntze, orth. var. | Pentameris P. Beauv. | | | Chondrochlaena Kuntze, orth. var. | Pentameris P. Beauv. |
| Chondrolaena Nees | Pentameris P. Beauv. | | | Chondrolaena Nees | Pentameris P. Beauv. |
| Chondrosum Desv. | Bouteloua Lag. | | | Chondrosum Desv. | Bouteloua Lag. |
| Chretomeris Nutt. ex J. G. Sm., nom. inval. | Elymus L. | | | Chretomeris Nutt. ex J. G. Sm., nom. inval. | Elymus L. |
| Chrysochloa Swallen | | a | | Chrysochloa Swallen | |
| Chrysopogon Trin. | | a | | Chrysopogon Trin. | |
| Chrysurus Pers. | Lamarckia Moench | | | Chrysurus Pers. | Lamarckia Moench |
| Chumsriella Bor | Germainia Balansa & Poitr. | | | Chumsriella Bor | Germainia Balansa & Poitr. |
| Chusquea Kunth | | a | | Chusquea Kunth | |
| Cinna L. | | a | | Cinna L. | |
| Cinnagrostis Griseb. | Calamagrostis Adans. | | | Cinnagrostis Griseb. | Calamagrostis Adans. |
| Cinnastrum E. Fourn. | Cinna L. | | | Cinnastrum E. Fourn. | Cinna L. |
| Cladoraphis Franch. | | a | | Cladoraphis Franch. | |
| Claudia Opiz | Melica L. | | | Claudia Opiz | Melica L. |
| Clausospicula Lazarides | | a | | Clausospicula Lazarides | |
| Clavinodum T. H. Wen | Arundinaria Michx. | | | Clavinodum T. H. Wen | Arundinaria Michx. |
| Cleachne Adans., nom. inval. | Paspalum L. | | | Cleachne Adans., nom. inval. | Paspalum L. |
| Cleistachne Benth. | | a | | Cleistachne Benth. | |
| Cleistochloa C. E. Hubb. | | a | | Cleistochloa C. E. Hubb. | |
| Cleistogenes Keng, nom. inval. | Kengia Packer | | | Cleistogenes Keng, nom. inval. | Kengia Packer |
| Cleomena Roem. & Schult., orth. var. | Muhlenbergia Schreb. | | | Cleomena Roem. & Schult., orth. var. | Muhlenbergia Schreb. |
| Cliffordiochloa B. K. Simon | | a | | Cliffordiochloa B. K. Simon | |
| Clinelymus (Griseb.) Nevski | Elymus L. | | | Clinelymus (Griseb.) Nevski | Elymus L. |
| Clomena P. Beauv. | Muhlenbergia Schreb. | | | Clomena P. Beauv. | Muhlenbergia Schreb. |
| Cockaynea Zotov | Elymus L. | | | Cockaynea Zotov | Elymus L. |
| Codonachne Steud., nom. inval. | Tetrapogon Desf. | | | Codonachne Steud., nom. inval. | Tetrapogon Desf. |
| Coelachne R. Br. | | a | | Coelachne R. Br. | |
| Coelachyropsis Bor | Coelachyrum Hochst. & Nees | | | Coelachyropsis Bor | Coelachyrum Hochst. & Nees |
| Coelachyrum Hochst. & Nees | | a | | Coelachyrum Hochst. & Nees | |
| Coelarthron Hook. f. | Microstegium Nees | | | Coelarthron Hook. f. | Microstegium Nees |
| Coelochloa Steud., nom. inval. | Coelachyrum Hochst. & Nees | | | Coelochloa Steud., nom. inval. | Coelachyrum Hochst. & Nees |
| Coelorachis Brongn. | Mnesithea Kunth | | | Coelorachis Brongn. | Mnesithea Kunth |
| Coix L. | | a | | Coix L. | |
| Colanthelia McClure & E. W. Sm. | | a | | Colanthelia McClure & E. W. Sm. | |
| Coleanthus Seidl | | a | | Coleanthus Seidl | |
| Coleataenia Griseb. | | a | | Coleataenia Griseb. | |
| Coliquea Steud. ex Bibra, nom. inval. | Chusquea Kunth | | | Coliquea Steud. ex Bibra, nom. inval. | Chusquea Kunth |
| Colladoa Cav. | Ischaemum L. | | | Colladoa Cav. | Ischaemum L. |
| Colobachne P. Beauv. | Alopecurus L. | | | Colobachne P. Beauv. | Alopecurus L. |
| Colobanthium (Rchb.) G. Taylor, nom. inval. | Avellinia Parl. | | | Colobanthium (Rchb.) G. Taylor, nom. inval. | Avellinia Parl. |
| Colobanthus (Trin.) Spach | Sphenopholis Scribn. | | | Colobanthus (Trin.) Spach | Sphenopholis Scribn. |
| Colpodium Trin. | | a | | Colpodium Trin. | |
| Commelinidium Stapf | Acroceras Stapf | | | Commelinidium Stapf | Acroceras Stapf |
| Comopyrum (Jaub. & Spach) A. Love | Aegilops L. | | | Comopyrum (Jaub. & Spach) A. Love | Aegilops L. |
| Connorochloa Barkworth et al. | | a | | Connorochloa Barkworth et al. | |
| Coridochloa Nees | Alloteropsis J. Presl | | | Coridochloa Nees | Alloteropsis J. Presl |
| Cornucopiae L. | | a | | Cornucopiae L. | |
| Cortaderia Stapf | | a | | Cortaderia Stapf | |
| Corycarpus Spreng., orth. var. | Diarrhena P. Beauv. | | | Corycarpus Spreng., orth. var. | Diarrhena P. Beauv. |
| Corynephorus P. Beauv. | | a | | Corynephorus P. Beauv. | |
| Costia Willk. | Agropyron Gaertn. | | | Costia Willk. | Agropyron Gaertn. |
| Cottea Kunth | | a | | Cottea Kunth | |
| Craepalia Schrank | Lolium L. | | | Craepalia Schrank | Lolium L. |
| Craspedorhachis Benth. | | a | | Craspedorhachis Benth. | |
| Crassipes Swallen | Sclerochloa P. Beauv. | | | Crassipes Swallen | Sclerochloa P. Beauv. |
| Cremopyrum Schur, orth. var. | Eremopyrum (Ledeb.) Jaub. & Spach | | | Cremopyrum Schur, orth. var. | Eremopyrum (Ledeb.) Jaub. & Spach |
| Criciuma Soderstr. & Londono | | a | | Criciuma Soderstr. & Londono | |
| Crinipes Hochst. | | a | | Crinipes Hochst. | |
| Critesion Raf. | Hordeum L. | | | Critesion Raf. | Hordeum L. |
| Critho E. Mey. | Hordeum L. | | | Critho E. Mey. | Hordeum L. |
| Crithodium Link | Triticum L. | | | Crithodium Link | Triticum L. |
| Crithopsis Jaub. & Spach | | a | | Crithopsis Jaub. & Spach | |
| Crithopyrum Steud., nom. inval. | Elymus L. | | | Crithopyrum Steud., nom. inval. | Elymus L. |
| Crossotropis Stapf | Trichoneura Andersson | | | Crossotropis Stapf | Trichoneura Andersson |
| Crypsinna E. Fourn. | Muhlenbergia Schreb. | | | Crypsinna E. Fourn. | Muhlenbergia Schreb. |
| Crypsis Aiton | | a | | Crypsis Aiton | |
| Cryptochloa Swallen | | a | | Cryptochloa Swallen | |
| Cryptochloris Benth. | Tetrapogon Desf. | | | Cryptochloris Benth. | Tetrapogon Desf. |
| Cryptopyrum Heynh., nom. inval. | Elymus L. | | | Cryptopyrum Heynh., nom. inval. | Elymus L. |
| Cryptostachys Steud. | Sporobolus R. Br. | | | Cryptostachys Steud. | Sporobolus R. Br. |
| Crypturus Trin. | Lolium L. | | | Crypturus Trin. | Lolium L. |
| Ctenium Panz. | | a | | Ctenium Panz. | |
| Ctenopsis De Not. | | a | | Ctenopsis De Not. | |
| Curtopogon P. Beauv. | Aristida L. | | | Curtopogon P. Beauv. | Aristida L. |
| Cutandia Willk. | | a | | Cutandia Willk. | |
| Cuviera Koeler | Hordelymus (Jess.) Harz | | | Cuviera Koeler | Hordelymus (Jess.) Harz |
| Cyathopus Stapf | | a | | Cyathopus Stapf | |
| Cyathorhachis Nees | | a | | Cyathorhachis Nees | |
| Cyclostachya Reeder & C. Reeder | Bouteloua Lag. | | | Cyclostachya Reeder & C. Reeder | Bouteloua Lag. |
| Cycloteria Stapf, nom. inval. | Mnesithea Kunth | | | Cycloteria Stapf, nom. inval. | Mnesithea Kunth |
| Cylichnium Dulac | Gaudinia P. Beauv. | | | Cylichnium Dulac | Gaudinia P. Beauv. |
| Cylindropyrum (Jaub. & Spach) A. Love | Aegilops L. | | | Cylindropyrum (Jaub. & Spach) A. Love | Aegilops L. |
| Cymatochloa Schltdl. | Paspalum L. | | | Cymatochloa Schltdl. | Paspalum L. |
| Cymbanthelia Andersson, nom. inval. | Cymbopogon Spreng. | | | Cymbanthelia Andersson, nom. inval. | Cymbopogon Spreng. |
| Cymbopogon Spreng. | | a | | Cymbopogon Spreng. | |
| Cymbosetaria Schweick. | Setaria P. Beauv. | | | Cymbosetaria Schweick. | Setaria P. Beauv. |
| Cynodon Rich. | | a | | Cynodon Rich. | |
| Cynosurus L. | | a | | Cynosurus L. | |
| Cyperochloa Lazarides & L. Watson | | a | | Cyperochloa Lazarides & L. Watson | |
| Cyphochlaena Hack. | | a | | Cyphochlaena Hack. | |
| Cypholepis Chiov. | Coelachyrum Hochst. & Nees | | | Cypholepis Chiov. | Coelachyrum Hochst. & Nees |
| Cyphonanthus Zuloaga & Morrone | Panicum L. | | | Cyphonanthus Zuloaga & Morrone | Panicum L. |
| Cyrtochloa S. Dransf. | | a | | Cyrtochloa S. Dransf. | |
| Cyrtococcum Stapf | | a | | Cyrtococcum Stapf | |
| Cyrtopogon Spreng., orth. var. | Aristida L. | | | Cyrtopogon Spreng., orth. var. | Aristida L. |
| Czerniaevia Ledeb., nom. inval. | Deschampsia P. Beauv. | | | Czerniaevia Ledeb., nom. inval. | Deschampsia P. Beauv. |
| Czernya C. Presl | Phragmites Adans. | | | Czernya C. Presl | Phragmites Adans. |
| Dactilon Vill. | Cynodon Rich. | | | Dactilon Vill. | Cynodon Rich. |
| Dactylis L. | | a | | Dactylis L. | |
| Dactyloctenium Willd. | | a | | Dactyloctenium Willd. | |
| Dactylodes Kuntze | Tripsacum L. | | | Dactylodes Kuntze | Tripsacum L. |
| Dactylogramma Link | Muhlenbergia Schreb. | | | Dactylogramma Link | Muhlenbergia Schreb. |
| Dactylus Asch., orth. var. | Cynodon Rich. | | | Dactylus Asch., orth. var. | Cynodon Rich. |
| Daknopholis Clayton | | a | | Daknopholis Clayton | |
| Dallwatsonia B. K. Simon | | a | | Dallwatsonia B. K. Simon | |
| Dalucum Adans. | Melica L. | | | Dalucum Adans. | Melica L. |
| Danthonia DC. | | a | | Danthonia DC. | |
| Danthoniastrum (Holub) Holub | Metcalfia Conert | | | Danthoniastrum (Holub) Holub | Metcalfia Conert |
| Danthonidium C. E. Hubb. | | a | | Danthonidium C. E. Hubb. | |
| Danthoniopsis Stapf | | a | | Danthoniopsis Stapf | |
| Danthorhiza Ten., nom. inval. | Helictotrichon Besser | | | Danthorhiza Ten., nom. inval. | Helictotrichon Besser |
| Dasiola Raf. | Vulpia C. C. Gmel. | | | Dasiola Raf. | Vulpia C. C. Gmel. |
| Dasyochloa Willd. ex Rydb. | | a | | Dasyochloa Willd. ex Rydb. | |
| Dasypoa Pilg. | Poa L. | | | Dasypoa Pilg. | Poa L. |
| Dasypyrum (Coss. & Durieu) T. Durand | | a | | Dasypyrum (Coss. & Durieu) T. Durand | |
| ×Dasytriticum ined. | | a | | Dasytriticum ined. | |
| Davidsea Soderstr. & R. P. Ellis | | a | | Davidsea Soderstr. & R. P. Ellis | |
| Davyella Hack. | Neostapfia Burtt Davy | | | Davyella Hack. | Neostapfia Burtt Davy |
| Decandolia Bastard | Agrostis L. | | | Decandolia Bastard | Agrostis L. |
| Decaryella A. Camus | | a | | Decaryella A. Camus | |
| Decaryochloa A. Camus | | a | | Decaryochloa A. Camus | |
| Deina Alef. | Triticum L. | | | Deina Alef. | Triticum L. |
| Demazeria Dumort., orth. var. | Desmazeria Dumort. | | | Demazeria Dumort., orth. var. | Desmazeria Dumort. |
| Dendragrostis Nees ex B. D. Jacks., nom. inval. | Chusquea Kunth | | | Dendragrostis Nees ex B. D. Jacks., nom. inval. | Chusquea Kunth |
| ×Dendrocalambusa ined. | | a | | Dendrocalambusa ined. | |
| Dendrocalamopsis (L. C. Chia & H. L. Fung) Q. H. Dai & X. L. Tao | Bambusa Schreb. | | | Dendrocalamopsis (L. C. Chia & H. L. Fung) Q. H. Dai & X. L. Tao | Bambusa Schreb. |
| Dendrocalamus Nees | | a | | Dendrocalamus Nees | |
| Dendrochloa C. E. Parkinson | Schizostachyum Nees | | | Dendrochloa C. E. Parkinson | Schizostachyum Nees |
| Deschampsia P. Beauv. | | a | | Deschampsia P. Beauv. | |
| Desmazeria Dumort. | | a | | Desmazeria Dumort. | |
| Desmostachya (Stapf) Stapf | | a | | Desmostachya (Stapf) Stapf | |
| Despretzia Kunth | Zeugites P. Browne | | | Despretzia Kunth | Zeugites P. Browne |
| Devauxia Kunth, nom. inval. | Glyceria R. Br. | | | Devauxia Kunth, nom. inval. | Glyceria R. Br. |
| Deyeuxia Clarion ex P. Beauv. | Calamagrostis Adans. | | | Deyeuxia Clarion ex P. Beauv. | Calamagrostis Adans. |
| Diachroa Nutt. | Leptochloa P. Beauv. | | | Diachroa Nutt. | Leptochloa P. Beauv. |
| Diachyrium Griseb. | Sporobolus R. Br. | | | Diachyrium Griseb. | Sporobolus R. Br. |
| Diacisperma Kuntze | Leptochloa P. Beauv. | | | Diacisperma Kuntze | Leptochloa P. Beauv. |
| Diandranthus Liou, nom. inval. | Miscanthus Andersson | | | Diandranthus Liou, nom. inval. | Miscanthus Andersson |
| Diandrochloa De Winter | Eragrostis Wolf | | | Diandrochloa De Winter | Eragrostis Wolf |
| Diandrolyra Stapf | | a | | Diandrolyra Stapf | |
| Diandrostachya (C. E. Hubb.) Jacq.-Fel. | Loudetiopsis Conert | | | Diandrostachya (C. E. Hubb.) Jacq.-Fel. | Loudetiopsis Conert |
| Diarina Raf. | Diarrhena P. Beauv. | | | Diarina Raf. | Diarrhena P. Beauv. |
| Diarrhena P. Beauv. | | a | | Diarrhena P. Beauv. | |
| Diastemenanthe Desv. | Stenotaphrum Trin. | | | Diastemenanthe Desv. | Stenotaphrum Trin. |
| Dichaetaria Nees | | a | | Dichaetaria Nees | |
| Dichanthelium (Hitchc. & Chase) Gould | | a | | Dichanthelium (Hitchc. & Chase) Gould | |
| Dichanthium Willemet | | a | | Dichanthium Willemet | |
| Dichelachne Endl. | | a | | Dichelachne Endl. | |
| Dichromus Schltdl., nom. inval. | Paspalum L. | | | Dichromus Schltdl., nom. inval. | Paspalum L. |
| Dictyochloa (Murb.) E. G. Camus | Ammochloa Boiss. | | | Dictyochloa (Murb.) E. G. Camus | Ammochloa Boiss. |
| Didactylon Zoll. & Moritzi | Dimeria R. Br. | | | Didactylon Zoll. & Moritzi | Dimeria R. Br. |
| Didymochaeta Steud. | Agrostis L. | | | Didymochaeta Steud. | Agrostis L. |
| Didymogonyx (L. G. Clark & Londoño) C. D. Tyrrell et al. | | a | | Didymogonyx (L. G. Clark & Londoño) C. D. Tyrrell et al. | |
| Diectomis Kunth | Andropogon L. | | | Diectomis Kunth | Andropogon L. |
| Diectomis P. Beauv. | Anadelphia Hack. | | | Diectomis P. Beauv. | Anadelphia Hack. |
| Dielsiochloa Pilg. | Festuca L. | | | Dielsiochloa Pilg. | Festuca L. |
| Digastrium (Hack.) A. Camus | | a | | Digastrium (Hack.) A. Camus | |
| Digitaria Haller | | a | | Digitaria Haller | |
| Digitaria Heist. ex Fabr. | Paspalum L. | | | Digitaria Heist. ex Fabr. | Paspalum L. |
| Digitariella De Winter | Digitaria Haller | | | Digitariella De Winter | Digitaria Haller |
| Digitariopsis C. E. Hubb. | Digitaria Haller | | | Digitariopsis C. E. Hubb. | Digitaria Haller |
| Dignathia Stapf | | a | | Dignathia Stapf | |
| Digraphis Trin. | Phalaris L. | | | Digraphis Trin. | Phalaris L. |
| Diheteropogon (Hack.) Stapf | | a | | Diheteropogon (Hack.) Stapf | |
| Dilepyrum Michx. | Muhlenbergia Schreb. | | | Dilepyrum Michx. | Muhlenbergia Schreb. |
| Dilepyrum Raf. | Oryzopsis Michx. | | | Dilepyrum Raf. | Oryzopsis Michx. |
| Dileucaden (Raf.) Steud., nom. inval. | Panicum L. | | | Dileucaden (Raf.) Steud., nom. inval. | Panicum L. |
| Dilophotriche (C. E. Hubb.) Jacq.-Fel. | | a | | Dilophotriche (C. E. Hubb.) Jacq.-Fel. | |
| Dimeiostemon Raf. | Andropogon L. | | | Dimeiostemon Raf. | Andropogon L. |
| Dimeria R. Br. | | a | | Dimeria R. Br. | |
| Dimesia Raf. | Anthoxanthum L. | | | Dimesia Raf. | Anthoxanthum L. |
| Dimorphochloa S. T. Blake | Cleistochloa C. E. Hubb. | | | Dimorphochloa S. T. Blake | Cleistochloa C. E. Hubb. |
| Dimorphostachys E. Fourn. | Paspalum L. | | | Dimorphostachys E. Fourn. | Paspalum L. |
| Dinebra Jacq. | | a | | Dinebra Jacq. | |
| Dinochloa Buse | | a | | Dinochloa Buse | |
| Diperium Desv. | Mnesithea Kunth | | | Diperium Desv. | Mnesithea Kunth |
| Diplachne P. Beauv. | | a | | Diplachne P. Beauv. | |
| Diplasanthum Desv. | Dichanthium Willemet | | | Diplasanthum Desv. | Dichanthium Willemet |
| Diplax Sol. ex Benn. | Ehrharta Thunb. | | | Diplax Sol. ex Benn. | Ehrharta Thunb. |
| Diplocea Raf. | Triplasis P. Beauv. | | | Diplocea Raf. | Triplasis P. Beauv. |
| Diplogon Poir., orth. var. | Diplopogon R. Br. | | | Diplogon Poir., orth. var. | Diplopogon R. Br. |
| Diplopogon R. Br. | | a | | Diplopogon R. Br. | |
| Dipogon Steud., nom. inval. | Sorghastrum Nash | | | Dipogon Steud., nom. inval. | Sorghastrum Nash |
| Dipogonia P. Beauv. | Diplopogon R. Br. | | | Dipogonia P. Beauv. | Diplopogon R. Br. |
| Diptychum Dulac | Sesleria Scop. | | | Diptychum Dulac | Sesleria Scop. |
| Disakisperma Steud. | | a | | Disakisperma Steud. | |
| Disarrenum Labill. | Anthoxanthum L. | | | Disarrenum Labill. | Anthoxanthum L. |
| Dissanthelium Trin. | | a | | Dissanthelium Trin. | |
| Dissochondrus (Hillebr.) Kuntze | | a | | Dissochondrus (Hillebr.) Kuntze | |
| Distichlis Raf. | | a | | Distichlis Raf. | |
| Distomomischus Dulac | Vulpia C. C. Gmel. | | | Distomomischus Dulac | Vulpia C. C. Gmel. |
| Doellochloa Kuntze | Gymnopogon P. Beauv. | | | Doellochloa Kuntze | Gymnopogon P. Beauv. |
| Dolichochaete (C. E. Hubb.) J. B. Phipps | Tristachya Nees | | | Dolichochaete (C. E. Hubb.) J. B. Phipps | Tristachya Nees |
| Donacium Fr. | Arundo L. | | | Donacium Fr. | Arundo L. |
| Donax P. Beauv. | Arundo L. | | | Donax P. Beauv. | Arundo L. |
| Douglasdeweya C. Yen et al. | | a | | Douglasdeweya C. Yen et al. | |
| Drake-Brockmania Stapf | Dinebra Jacq. | | | Drake-Brockmania Stapf | Dinebra Jacq. |
| Dregeochloa Conert | | a | | Dregeochloa Conert | |
| Drepanostachyum Keng f. | | a | | Drepanostachyum Keng f. | |
| Drymochloa Holub | Festuca L. | | | Drymochloa Holub | Festuca L. |
| Drymonaetes Fourr., nom. inval. | Festuca L. | | | Drymonaetes Fourr., nom. inval. | Festuca L. |
| Dryopoa Vickery | | a | | Dryopoa Vickery | |
| Dupontia R. Br. | | a | | Dupontia R. Br. | |
| Dupontiopsis Soreng et al. | | a | | Dupontiopsis Soreng et al. | |
| Duthiea Hack. | | a | | Duthiea Hack. | |
| Dybowskia Stapf | Hyparrhenia Andersson ex E. Fourn. | | | Dybowskia Stapf | Hyparrhenia Andersson ex E. Fourn. |
| Eatonia Raf. | Panicum L. | | | Eatonia Raf. | Panicum L. |
| Eccoilopus Steud. | Spodiopogon Trin. | | | Eccoilopus Steud. | Spodiopogon Trin. |
| Eccoptocarpha Launert | | a | | Eccoptocarpha Launert | |
| Echinalysium Trin. | Elytrophorus P. Beauv. | | | Echinalysium Trin. | Elytrophorus P. Beauv. |
| Echinanthus Cerv. | Tragus Haller | | | Echinanthus Cerv. | Tragus Haller |
| Echinaria Fabr. | Cenchrus L. | | | Echinaria Fabr. | Cenchrus L. |
| Echinaria Desf. | | a | | Echinaria Desf. | |
| Echinochlaena Spreng., orth. var. | Echinolaena Desv. | | | Echinochlaena Spreng., orth. var. | Echinolaena Desv. |
| Echinochloa P. Beauv. | | a | | Echinochloa P. Beauv. | |
| Echinolaena Desv. | | a | | Echinolaena Desv. | |
| Echinopogon P. Beauv. | | a | | Echinopogon P. Beauv. | |
| Ectosperma Swallen | Swallenia Soderstr. & H. F. Decker | | | Ectosperma Swallen | Swallenia Soderstr. & H. F. Decker |
| Ectrosia R. Br. | | a | | Ectrosia R. Br. | |
| Ectrosiopsis (Ohwi) Jansen | Ectrosia R. Br. | | | Ectrosiopsis (Ohwi) Jansen | Ectrosia R. Br. |
| Ehrharta Thunb. | | a | | Ehrharta Thunb. | |
| Ehrhartia F. H. Wigg. | Leersia Sw. | | | Ehrhartia F. H. Wigg. | Leersia Sw. |
| Ekmanochloa Hitchc. | | a | | Ekmanochloa Hitchc. | |
| Electra Panz. | Schismus P. Beauv. | | | Electra Panz. | Schismus P. Beauv. |
| Eleusine Gaertn. | | a | | Eleusine Gaertn. | |
| Elionurus Humb. & Bonpl. ex Willd. | | a | | Elionurus Humb. & Bonpl. ex Willd. | |
| Ellisochloa P. M. Peterson & N. P. Barker | | a | | Ellisochloa P. M. Peterson & N. P. Barker | |
| ×Elyhordeum Mansf. ex Tsitsin & K. A. Petrowa | | a | | Elyhordeum Mansf. ex Tsitsin & K. A. Petrowa | |
| ×Elyleymus B. R. Baum | | a | | Elyleymus B. R. Baum | |
| Elymandra Stapf | | a | | Elymandra Stapf | |
| ×Elymordeum Lepage | ×Elyhordeum Mansf. ex Tsitsin & K. A. Petrowa | | | Elymordeum Lepage | Elyhordeum Mansf. ex Tsitsin & K. A. Petrowa |
| ×Elymotriticum P. Fourn. | | a | | Elymotriticum P. Fourn. | |
| Elymus L. | | a | | Elymus L. | |
| Elymus Mitch. | Zizania L. | | | Elymus Mitch. | Zizania L. |
| Elyonurus Humb. & Bonpl. ex Willd., orth. var. | Elionurus Humb. & Bonpl. ex Willd. | | | Elyonurus Humb. & Bonpl. ex Willd., orth. var. | Elionurus Humb. & Bonpl. ex Willd. |
| ×Elysitanion Bowden | Elymus L. | | | Elysitanion Bowden | Elymus L. |
| Elytrigia Desv. | Elymus L. | | | Elytrigia Desv. | Elymus L. |
| ×Elytriticale ined. | | a | | Elytriticale ined. | |
| ×Elytritilops ined. | | a | | Elytritilops ined. | |
| Elytroblepharum (Steud.) Schltdl. | Digitaria Haller | | | Elytroblepharum (Steud.) Schltdl. | Digitaria Haller |
| Elytrophorus P. Beauv. | | a | | Elytrophorus P. Beauv. | |
| Elytrostachys McClure | | a | | Elytrostachys McClure | |
| Endallex Raf. | Phalaris L. | | | Endallex Raf. | Phalaris L. |
| Endodia Raf. | Leersia Sw. | | | Endodia Raf. | Leersia Sw. |
| Enneapogon Desv. ex P. Beauv. | | a | | Enneapogon Desv. ex P. Beauv. | |
| Enodium Pers. ex Gaudin | Molinia Schrank | | | Enodium Pers. ex Gaudin | Molinia Schrank |
| Enteropogon Nees | | a | | Enteropogon Nees | |
| Entolasia Stapf | | a | | Entolasia Stapf | |
| Entoplocamia Stapf | | a | | Entoplocamia Stapf | |
| Ephebopogon Steud., nom. inval. | Microstegium Nees | | | Ephebopogon Steud., nom. inval. | Microstegium Nees |
| Epicampes J. Presl | Muhlenbergia Schreb. | | | Epicampes J. Presl | Muhlenbergia Schreb. |
| Eragrostiella Bor | | a | | Eragrostiella Bor | |
| Eragrostis Wolf | | a | | Eragrostis Wolf | |
| Eremitis Doll | | a | | Eremitis Doll | |
| Eremium Seberg & Linde-Laursen | Leymus Hochst. | | | Eremium Seberg & Linde-Laursen | Leymus Hochst. |
| Eremocaulon Soderstr. & Londono | | a | | Eremocaulon Soderstr. & Londono | |
| Eremochlamys Peter | Tricholaena Schrad. | | | Eremochlamys Peter | Tricholaena Schrad. |
| Eremochloa Buse | | a | | Eremochloa Buse | |
| Eremochloe S. Watson | Blepharidachne Hack. | | | Eremochloe S. Watson | Blepharidachne Hack. |
| Eremopoa Roshev. | | a | | Eremopoa Roshev. | |
| Eremopogon Stapf | Dichanthium Willemet | | | Eremopogon Stapf | Dichanthium Willemet |
| Eremopyrum (Ledeb.) Jaub. & Spach | | a | | Eremopyrum (Ledeb.) Jaub. & Spach | |
| Eriachne R. Br. | | a | | Eriachne R. Br. | |
| Eriachne Phil. | Digitaria Haller | | | Eriachne Phil. | Digitaria Haller |
| Erianthecium Parodi | | a | | Erianthecium Parodi | |
| Erianthus Michx. | Saccharum L. | | | Erianthus Michx. | Saccharum L. |
| Erioblastus Honda | Deschampsia P. Beauv. | | | Erioblastus Honda | Deschampsia P. Beauv. |
| Eriochaeta Fig. & De Not. | Pennisetum Rich. | | | Eriochaeta Fig. & De Not. | Pennisetum Rich. |
| Eriochloa Kunth | | a | | Eriochloa Kunth | |
| Eriochrysis P. Beauv. | | a | | Eriochrysis P. Beauv. | |
| Eriocoma Nutt. | Achnatherum P. Beauv. | | | Eriocoma Nutt. | Achnatherum P. Beauv. |
| Eriolytrum Kunth, nom. inval. | Panicum L. | | | Eriolytrum Kunth, nom. inval. | Panicum L. |
| Erioneuron Nash | | a | | Erioneuron Nash | |
| Eriopodium Hochst., nom. inval. | Andropogon L. | | | Eriopodium Hochst., nom. inval. | Andropogon L. |
| Erochloe Raf. | Eragrostis Wolf | | | Erochloe Raf. | Eragrostis Wolf |
| Erosion Lunell | Eragrostis Wolf | | | Erosion Lunell | Eragrostis Wolf |
| Erucaria Cerv. | Bouteloua Lag. | | | Erucaria Cerv. | Bouteloua Lag. |
| Erythranthera Zotov | Rytidosperma Steud. | | | Erythranthera Zotov | Rytidosperma Steud. |
| Euchlaena Schrad. | Zea L. | | | Euchlaena Schrad. | Zea L. |
| Euclasta Franch. | | a | | Euclasta Franch. | |
| Eudonax Fr. | Arundo L. | | | Eudonax Fr. | Arundo L. |
| Eufournia Reeder | Sohnsia Airy Shaw | | | Eufournia Reeder | Sohnsia Airy Shaw |
| Euklastaxon Steud. | Andropogon L. | | | Euklastaxon Steud. | Andropogon L. |
| Eulalia Kunth | | a | | Eulalia Kunth | |
| Eulaliopsis Honda | | a | | Eulaliopsis Honda | |
| Eupogon Desv., nom. inval. | Andropogon L. | | | Eupogon Desv., nom. inval. | Andropogon L. |
| Euraphis (Trin.) Lindl. | Boissiera Hochst. ex Steud. | | | Euraphis (Trin.) Lindl. | Boissiera Hochst. ex Steud. |
| Eustachys Desv. | | a | | Eustachys Desv. | |
| Euthryptochloa Cope | Phaenosperma Munro ex Benth. | | | Euthryptochloa Cope | Phaenosperma Munro ex Benth. |
| Eutriana Trin. | Bouteloua Lag. | | | Eutriana Trin. | Bouteloua Lag. |
| Exagrostis Steud., nom. inval. | Eragrostis Wolf | | | Exagrostis Steud., nom. inval. | Eragrostis Wolf |
| Exotheca Andersson | | a | | Exotheca Andersson | |
| Exydra Endl. | Glyceria R. Br. | | | Exydra Endl. | Glyceria R. Br. |
| Falimiria (Rchb.) Rchb. | Gaudinia P. Beauv. | | | Falimiria (Rchb.) Rchb. | Gaudinia P. Beauv. |
| Falona Adans. | Cynosurus L. | | | Falona Adans. | Cynosurus L. |
| Fargesia Franch. | | a | | Fargesia Franch. | |
| Farrago Clayton | | a | | Farrago Clayton | |
| Fartis Adans. | Zizania L. | | | Fartis Adans. | Zizania L. |
| Fasciculochloa B. K. Simon & C. M. Weiller | Steinchisma Raf. | | | Fasciculochloa B. K. Simon & C. M. Weiller | Steinchisma Raf. |
| Fendleria Steud. | Oryzopsis Michx. | | | Fendleria Steud. | Oryzopsis Michx. |
| Ferrocalamus Hsueh & Keng f. | | a | | Ferrocalamus Hsueh & Keng f. | |
| Festuca L. | | a | | Festuca L. | |
| Festucaria Heist. ex Fabr. | Festuca L. | | | Festucaria Heist. ex Fabr. | Festuca L. |
| Festucaria Link | Vulpia C. C. Gmel. | | | Festucaria Link | Vulpia C. C. Gmel. |
| Festucella E. B. Alexeev | | a | | Festucella E. B. Alexeev | |
| Festucopsis (C. E. Hubb.) Melderis | | a | | Festucopsis (C. E. Hubb.) Melderis | |
| ×Festulolium Asch. & Graebn. | | a | | Festulolium Asch. & Graebn. | |
| Fibichia Koeler | Cynodon Rich. | | | Fibichia Koeler | Cynodon Rich. |
| Filgueirasia Guala | | a | | Filgueirasia Guala | |
| Filipedium Raizada & S. K. Jain | Capillipedium Stapf | | | Filipedium Raizada & S. K. Jain | Capillipedium Stapf |
| Fimbribambusa Widjaja | | a | | Fimbribambusa Widjaja | |
| Fingerhuthia Nees | | a | | Fingerhuthia Nees | |
| Fiorinia Parl. | Aira L. | | | Fiorinia Parl. | Aira L. |
| Flavia Heist. ex Fabr. | Anthoxanthum L. | | | Flavia Heist. ex Fabr. | Anthoxanthum L. |
| Fluminia Fr. | Scolochloa Link | | | Fluminia Fr. | Scolochloa Link |
| Foenodorum E. H. L. Krause | Anthoxanthum L. | | | Foenodorum E. H. L. Krause | Anthoxanthum L. |
| Forasaccus Bubani | Bromus L. | | | Forasaccus Bubani | Bromus L. |
| Fourniera Scribn. | Bouteloua Lag. | | | Fourniera Scribn. | Bouteloua Lag. |
| Froesiochloa G. A. Black | | a | | Froesiochloa G. A. Black | |
| Frumentum E. H. L. Krause | Triticum L. | | | Frumentum E. H. L. Krause | Triticum L. |
| Fussia Schur | Aira L. | | | Fussia Schur | Aira L. |
| Galeottia M. Martens & Galeotti, nom. inval. | Zeugites P. Browne | | | Galeottia M. Martens & Galeotti, nom. inval. | Zeugites P. Browne |
| Gamelythrum Nees | Amphipogon R. Br. | | | Gamelythrum Nees | Amphipogon R. Br. |
| Gaoligongshania D. Z. Li et al. | | a | | Gaoligongshania D. Z. Li et al. | |
| Garnotia Brongn. | | a | | Garnotia Brongn. | |
| Garnotiella Stapf | Asthenochloa Buse | | | Garnotiella Stapf | Asthenochloa Buse |
| Gastridium P. Beauv. | | a | | Gastridium P. Beauv. | |
| Gastropyrum (Jaub. & Spach) A. Love | Aegilops L. | | | Gastropyrum (Jaub. & Spach) A. Love | Aegilops L. |
| Gaudinia P. Beauv. | | a | | Gaudinia P. Beauv. | |
| Gaudinopsis (Boiss.) Eig | | a | | Gaudinopsis (Boiss.) Eig | |
| Gazachloa J. B. Phipps | Danthoniopsis Stapf | | | Gazachloa J. B. Phipps | Danthoniopsis Stapf |
| Gelidocalamus T. H. Wen | | a | | Gelidocalamus T. H. Wen | |
| Genea (Dumort.) Dumort. | Bromus L. | | | Genea (Dumort.) Dumort. | Bromus L. |
| Geochloa H. P. Linder & N. P. Barker | | a | | Geochloa H. P. Linder & N. P. Barker | |
| Geopogon Steud., nom. inval. | Chloris Sw. | | | Geopogon Steud., nom. inval. | Chloris Sw. |
| Germainia Balansa & Poitr. | | a | | Germainia Balansa & Poitr. | |
| Gerritea Zuloaga et al. | | a | | Gerritea Zuloaga et al. | |
| Gigachilon Seidl | Triticum L. | | | Gigachilon Seidl | Triticum L. |
| Gigantochloa Kurz ex Munro | | a | | Gigantochloa Kurz ex Munro | |
| Gilgiochloa Pilg. | | a | | Gilgiochloa Pilg. | |
| Ginannia Bubani | Holcus L. | | | Ginannia Bubani | Holcus L. |
| Glandiloba (Raf.) Steud., nom. inval. | Eriochloa Kunth | | | Glandiloba (Raf.) Steud., nom. inval. | Eriochloa Kunth |
| Glaziophyton Franch. | | a | | Glaziophyton Franch. | |
| Glyceria R. Br. | | a | | Glyceria R. Br. | |
| Glyphochloa Clayton | | a | | Glyphochloa Clayton | |
| Gnomonia Lunell | Festuca L. | | | Gnomonia Lunell | Festuca L. |
| Goldbachia Trin. | Arundinella Raddi | | | Goldbachia Trin. | Arundinella Raddi |
| Gossweilerochloa Renvoize | Tridens Roem. & Schult. | | | Gossweilerochloa Renvoize | Tridens Roem. & Schult. |
| Gouinia E. Fourn. | | a | | Gouinia E. Fourn. | |
| Goulardia Husn. | Elymus L. | | | Goulardia Husn. | Elymus L. |
| Gouldochloa Valdes-Reyna et al. | Chasmanthium Link | | | Gouldochloa Valdes-Reyna et al. | Chasmanthium Link |
| Gracilea J. Koenig ex Hook. f. | Melanocenchris Nees | | | Gracilea J. Koenig ex Hook. f. | Melanocenchris Nees |
| Gramen Seg. | Secale L. | | | Gramen Seg. | Secale L. |
| Gramen Krause | Festuca L. | | | Gramen Krause | Festuca L. |
| Gramerium Desv. | Digitaria Haller | | | Gramerium Desv. | Digitaria Haller |
| Graminastrum E. H. L. Krause | Dissanthelium Trin. | | | Graminastrum E. H. L. Krause | Dissanthelium Trin. |
| Graphephorum Desv. | | a | | Graphephorum Desv. | |
| Graya Steud. | Sphaerocaryum Nees ex Hook. f. | | | Graya Steud. | Sphaerocaryum Nees ex Hook. f. |
| Greeneochloa P. M. Peterson et al. | | a | | Greeneochloa P. M. Peterson et al. | |
| Greenia Nutt. | Limnodea L. H. Dewey | | | Greenia Nutt. | Limnodea L. H. Dewey |
| Greslania Balansa | | a | | Greslania Balansa | |
| Griffithsochloa G. J. Pierce | Bouteloua Lag. | | | Griffithsochloa G. J. Pierce | Bouteloua Lag. |
| Guadella Franch., orth. var. | Guaduella Franch. | | | Guadella Franch., orth. var. | Guaduella Franch. |
| Guadua Kunth | | a | | Guadua Kunth | |
| Guaduella Franch. | | a | | Guaduella Franch. | |
| Gymnachne Parodi | | a | | Gymnachne Parodi | |
| Gymnandropogon (Nees) Duthie | Bothriochloa Kuntze | | | Gymnandropogon (Nees) Duthie | Bothriochloa Kuntze |
| Gymnanthelia Schweinf., nom. inval. | Cymbopogon Spreng. | | | Gymnanthelia Schweinf., nom. inval. | Cymbopogon Spreng. |
| Gymnopogon P. Beauv. | | a | | Gymnopogon P. Beauv. | |
| Gymnostichum Schreb. | Elymus L. | | | Gymnostichum Schreb. | Elymus L. |
| Gymnotrix P. Beauv. | Pennisetum Rich. | | | Gymnotrix P. Beauv. | Pennisetum Rich. |
| Gynerium Willd. ex P. Beauv. | | a | | Gynerium Willd. ex P. Beauv. | |
| Habrochloa C. E. Hubb. | | a | | Habrochloa C. E. Hubb. | |
| Habrurus Hochst., nom. inval. | Elionurus Humb. & Bonpl. ex Willd. | | | Habrurus Hochst., nom. inval. | Elionurus Humb. & Bonpl. ex Willd. |
| Hackelia Vasey, nom. inval. | Gouinia E. Fourn. | | | Hackelia Vasey, nom. inval. | Gouinia E. Fourn. |
| Hackelochloa Kuntze | Mnesithea Kunth | | | Hackelochloa Kuntze | Mnesithea Kunth |
| Hainardia Greuter | | a | | Hainardia Greuter | |
| Hakonechloa Makino ex Honda | | a | | Hakonechloa Makino ex Honda | |
| Halochloa Griseb. | Monanthochloe Engelm. | | | Halochloa Griseb. | Monanthochloe Engelm. |
| Halopyrum Stapf | | a | | Halopyrum Stapf | |
| Haplachne C. Presl | Dimeria R. Br. | | | Haplachne C. Presl | Dimeria R. Br. |
| Harpachne Hochst. ex A. Rich. | | a | | Harpachne Hochst. ex A. Rich. | |
| Harpochloa Kunth | | a | | Harpochloa Kunth | |
| Haynaldia Schur | Dasypyrum (Coss. & Durieu) T. Durand | | | Haynaldia Schur | Dasypyrum (Coss. & Durieu) T. Durand |
| ×Haynaldoticum Cif. & Giacom. | ×Dasytriticum ined. | | | Haynaldoticum Cif. & Giacom. | Dasytriticum ined. |
| Hekaterosachne Steud. | Oplismenus P. Beauv. | | | Hekaterosachne Steud. | Oplismenus P. Beauv. |
| Heleochloa Fr., nom. inval. | Glyceria R. Br. | | | Heleochloa Fr., nom. inval. | Glyceria R. Br. |
| Heleochloa P. Beauv. | Phleum L. | | | Heleochloa P. Beauv. | Phleum L. |
| Heleochloa Host ex Roem. | Crypsis Aiton | | | Heleochloa Host ex Roem. | Crypsis Aiton |
| Helictochloa Romero Zarco | | a | | Helictochloa Romero Zarco | |
| Helictotrichon Besser | | a | | Helictotrichon Besser | |
| Hellera Doll, nom. inval. | Raddia Bertol. | | | Hellera Doll, nom. inval. | Raddia Bertol. |
| Helleria E. Fourn. | Festuca L. | | | Helleria E. Fourn. | Festuca L. |
| Hellerochloa Rauschert | Festuca L. | | | Hellerochloa Rauschert | Festuca L. |
| Helopus Trin. | Eriochloa Kunth | | | Helopus Trin. | Eriochloa Kunth |
| Hemarthria R. Br. | | a | | Hemarthria R. Br. | |
| Hemibromus Steud. | Glyceria R. Br. | | | Hemibromus Steud. | Glyceria R. Br. |
| Hemigymnia Stapf | Ottochloa Dandy | | | Hemigymnia Stapf | Ottochloa Dandy |
| Hemimunroa Parodi | Munroa Torr. | | | Hemimunroa Parodi | Munroa Torr. |
| Hemisacris Steud. | Schismus P. Beauv. | | | Hemisacris Steud. | Schismus P. Beauv. |
| Hemisorghum C. E. Hubb. | | a | | Hemisorghum C. E. Hubb. | |
| Henrardia C. E. Hubb. | | a | | Henrardia C. E. Hubb. | |
| Heptaseta Koidz., nom. inval. | Agrostis L. | | | Heptaseta Koidz., nom. inval. | Agrostis L. |
| Hesperochloa (Piper) Rydb. | Festuca L. | | | Hesperochloa (Piper) Rydb. | Festuca L. |
| Hesperostipa (Elias) Barkworth | | a | | Hesperostipa (Elias) Barkworth | |
| Heterachne Benth. | | a | | Heterachne Benth. | |
| Heteranthelium Hochst. ex Jaub. & Spach | | a | | Heteranthelium Hochst. ex Jaub. & Spach | |
| Heteranthoecia Stapf | | a | | Heteranthoecia Stapf | |
| Heteranthus Borkh. | Ventenata Koeler | | | Heteranthus Borkh. | Ventenata Koeler |
| Heterelytron Jungh. | Themeda Forssk. | | | Heterelytron Jungh. | Themeda Forssk. |
| Heterocarpha Stapf & C. E. Hubb. | Drake-Brockmania Stapf | | | Heterocarpha Stapf & C. E. Hubb. | Drake-Brockmania Stapf |
| Heterochaeta Besser ex Schult. & Schult. f. | Ventenata Koeler | | | Heterochaeta Besser ex Schult. & Schult. f. | Ventenata Koeler |
| Heterochloa Desv. | Andropogon L. | | | Heterochloa Desv. | Andropogon L. |
| Heterolepis Boiss., nom. inval. | Chloris Sw. | | | Heterolepis Boiss., nom. inval. | Chloris Sw. |
| Heteropholis C. E. Hubb. | Mnesithea Kunth | | | Heteropholis C. E. Hubb. | Mnesithea Kunth |
| Heteropogon Pers. | | a | | Heteropogon Pers. | |
| Heterosteca Desv. | Bouteloua Lag. | | | Heterosteca Desv. | Bouteloua Lag. |
| Heuffelia Schur | Helictotrichon Besser | | | Heuffelia Schur | Helictotrichon Besser |
| Hexarrhena C. Presl | Hilaria Kunth | | | Hexarrhena C. Presl | Hilaria Kunth |
| Hibanobambusa Maruy. & H. Okamura | | a | | Hibanobambusa Maruy. & H. Okamura | |
| Hickelia A. Camus | | a | | Hickelia A. Camus | |
| Hierochloe R. Br. | Anthoxanthum L. | | | Hierochloe R. Br. | Anthoxanthum L. |
| Hilaria Kunth | | a | | Hilaria Kunth | |
| Hildaea C. Silva & R. P. Oliveira | | a | | Hildaea C. Silva & R. P. Oliveira | |
| Himalayacalamus Keng f. | | a | | Himalayacalamus Keng f. | |
| Hippagrostis Kuntze | Oplismenus P. Beauv. | | | Hippagrostis Kuntze | Oplismenus P. Beauv. |
| Hitchcockella A. Camus | | a | | Hitchcockella A. Camus | |
| Holboellia Hook. | Lopholepis Decne. | | | Holboellia Hook. | Lopholepis Decne. |
| Holcolemma Stapf & C. E. Hubb. | | a | | Holcolemma Stapf & C. E. Hubb. | |
| Holcus L. | | a | | Holcus L. | |
| Hologamium Nees | Sehima Forssk. | | | Hologamium Nees | Sehima Forssk. |
| Holosetum Steud. | Alloteropsis J. Presl | | | Holosetum Steud. | Alloteropsis J. Presl |
| Holttumochloa K. M. Wong | | a | | Holttumochloa K. M. Wong | |
| Homalachna Kuntze | Holcus L. | | | Homalachna Kuntze | Holcus L. |
| Homalachne Kuntze | Holcus L. | | | Homalachne Kuntze | Holcus L. |
| Homalocenchrus Mieg | Leersia Sw. | | | Homalocenchrus Mieg | Leersia Sw. |
| Homalotrichon Banfi et al. | Avenula (Dumort.) Dumort. | | | Homalotrichon Banfi et al. | Avenula (Dumort.) Dumort. |
| Homoeatherum Nees | Andropogon L. | | | Homoeatherum Nees | Andropogon L. |
| Homoiachne Pilg. | Deschampsia P. Beauv. | | | Homoiachne Pilg. | Deschampsia P. Beauv. |
| Homolepis Chase | | a | | Homolepis Chase | |
| Homopholis C. E. Hubb. | | a | | Homopholis C. E. Hubb. | |
| Homoplitis Trin. | Pogonatherum P. Beauv. | | | Homoplitis Trin. | Pogonatherum P. Beauv. |
| Homopogon Stapf | Trachypogon Nees | | | Homopogon Stapf | Trachypogon Nees |
| Homozeugos Stapf | | a | | Homozeugos Stapf | |
| Hookerochloa E. B. Alexeev | | a | | Hookerochloa E. B. Alexeev | |
| Hopia Zuloaga & Morrone | | a | | Hopia Zuloaga & Morrone | |
| Hoplismenus Hassk., orth. var. | Oplismenus P. Beauv. | | | Hoplismenus Hassk., orth. var. | Oplismenus P. Beauv. |
| ×Hordale Cif. & Giacom. | | a | | Hordale Cif. & Giacom. | |
| Hordelymus (Jess.) Harz | | a | | Hordelymus (Jess.) Harz | |
| Hordeum L. | | a | | Hordeum L. | |
| Hordeum L. subg. Hordeastrum | | a | i | Hordeum L. subg. Hordeastrum | |
| Hordeum L. subg. Hordeastrum sect. Marina | | a | i | Hordeum L. subg. Hordeastrum sect. Marina | |
| Hordeum L. subg. Hordeastrum sect. Nodosa | | a | i | Hordeum L. subg. Hordeastrum sect. Nodosa | |
| Hordeum L. subg. Hordeastrum sect. Stenostachys | | a | i | Hordeum L. subg. Hordeastrum sect. Stenostachys | |
| Hordeum L. subg. Hordeastrum sect. Stenostachys ser. Critesion | | a | i | Hordeum L. subg. Hordeastrum sect. Stenostachys ser. Critesion | |
| Hordeum L. subg. Hordeastrum sect. Stenostachys ser. Sibirica | | a | i | Hordeum L. subg. Hordeastrum sect. Stenostachys ser. Sibirica | |
| Hordeum L. subg. Hordeum | | a | i | Hordeum L. subg. Hordeum | |
| Hordeum L. subg. Hordeum sect. Hordeum | | a | i | Hordeum L. subg. Hordeum sect. Hordeum | |
| Hordeum L. subg. Hordeum sect. Trichostachys | | a | i | Hordeum L. subg. Hordeum sect. Trichostachys | |
| Houzeaubambus Mattei | Oxytenanthera Munro | | | Houzeaubambus Mattei | Oxytenanthera Munro |
| Hubbardia Bor | | a | | Hubbardia Bor | |
| Hubbardochloa Auquier | | a | | Hubbardochloa Auquier | |
| Humbertochloa A. Camus & Stapf | | a | | Humbertochloa A. Camus & Stapf | |
| Hyalopoa (Tzvelev) Tzvelev | | a | | Hyalopoa (Tzvelev) Tzvelev | |
| Hydrochloa Hartm. | Glyceria R. Br. | | | Hydrochloa Hartm. | Glyceria R. Br. |
| Hydrochloa P. Beauv. | Luziola Juss. | | | Hydrochloa P. Beauv. | Luziola Juss. |
| Hydropoa (Dumort.) Dumort. | Glyceria R. Br. | | | Hydropoa (Dumort.) Dumort. | Glyceria R. Br. |
| Hydropyrum Link | Zizania L. | | | Hydropyrum Link | Zizania L. |
| Hydrothauma C. E. Hubb. | | a | | Hydrothauma C. E. Hubb. | |
| Hygrochloa Lazarides | | a | | Hygrochloa Lazarides | |
| Hygrorhiza Benth., orth. var. | Hygroryza Nees | | | Hygrorhiza Benth., orth. var. | Hygroryza Nees |
| Hygroryza Nees | | a | | Hygroryza Nees | |
| Hylebates Chippind. | | a | | Hylebates Chippind. | |
| Hymenachne P. Beauv. | | a | | Hymenachne P. Beauv. | |
| Hymenothecium Lag. | Aegopogon Humb. & Bonpl. ex Willd. | | | Hymenothecium Lag. | Aegopogon Humb. & Bonpl. ex Willd. |
| Hyparrhenia Andersson ex E. Fourn. | | a | | Hyparrhenia Andersson ex E. Fourn. | |
| Hyperthelia Clayton | | a | | Hyperthelia Clayton | |
| Hypogynium Nees | Andropogon L. | | | Hypogynium Nees | Andropogon L. |
| Hypseochloa C. E. Hubb. | | a | | Hypseochloa C. E. Hubb. | |
| Hypudaerus A. Braun, nom. inval. | Anthephora Schreb. | | | Hypudaerus A. Braun, nom. inval. | Anthephora Schreb. |
| Hystericina Steud. | Echinopogon P. Beauv. | | | Hystericina Steud. | Echinopogon P. Beauv. |
| Hystringium Steud., nom. inval. | Tribolium Desv. | | | Hystringium Steud., nom. inval. | Tribolium Desv. |
| Hystrix Moench | Elymus L. | | | Hystrix Moench | Elymus L. |
| Ichnanthus P. Beauv. | | a | | Ichnanthus P. Beauv. | |
| Imperata Cirillo | | a | | Imperata Cirillo | |
| Indocalamus Nakai | | a | | Indocalamus Nakai | |
| Indochloa Bor | Euclasta Franch. | | | Indochloa Bor | Euclasta Franch. |
| Indopoa Bor | | a | | Indopoa Bor | |
| Indoryza A. N. Henry & B. Roy | Porteresia Tateoka | | | Indoryza A. N. Henry & B. Roy | Porteresia Tateoka |
| Indosasa McClure | | a | | Indosasa McClure | |
| Ioackima Ten., orth. var. | Beckmannia Host | | | Ioackima Ten., orth. var. | Beckmannia Host |
| Ipnum Phil. | Leptochloa P. Beauv. | | | Ipnum Phil. | Leptochloa P. Beauv. |
| Irulia Bedd., nom. inval. | Ochlandra Thwaites | | | Irulia Bedd., nom. inval. | Ochlandra Thwaites |
| Isachne R. Br. | | a | | Isachne R. Br. | |
| Isalus J. B. Phipps | Tristachya Nees | | | Isalus J. B. Phipps | Tristachya Nees |
| Ischaemopogon Griseb. | Ischaemum L. | | | Ischaemopogon Griseb. | Ischaemum L. |
| Ischaemum L. | | a | | Ischaemum L. | |
| Ischnanthus Roem. & Schult., orth. var. | Ichnanthus P. Beauv. | | | Ischnanthus Roem. & Schult., orth. var. | Ichnanthus P. Beauv. |
| Ischnochloa Hook. f. | Microstegium Nees | | | Ischnochloa Hook. f. | Microstegium Nees |
| Ischnurus Balf. f. | Lepturus R. Br. | | | Ischnurus Balf. f. | Lepturus R. Br. |
| Ischurochloa Buse | Bambusa Schreb. | | | Ischurochloa Buse | Bambusa Schreb. |
| Iseilema Andersson | | a | | Iseilema Andersson | |
| Ixalum G. Forst., nom. inval. | Spinifex L. | | | Ixalum G. Forst., nom. inval. | Spinifex L. |
| Ixophorus Schltdl. | | a | | Ixophorus Schltdl. | |
| Jacquesfelixia J. B. Phipps | Danthoniopsis Stapf | | | Jacquesfelixia J. B. Phipps | Danthoniopsis Stapf |
| Jansenella Bor | | a | | Jansenella Bor | |
| Jarava Ruiz & Pav. | | a | | Jarava Ruiz & Pav. | |
| Jardinea Steud. | Phacelurus Griseb. | | | Jardinea Steud. | Phacelurus Griseb. |
| Joachima Ten. | Beckmannia Host | | | Joachima Ten. | Beckmannia Host |
| Joannegria Chiov. | Lintonia Stapf | | | Joannegria Chiov. | Lintonia Stapf |
| Jouvea E. Fourn. | | a | | Jouvea E. Fourn. | |
| Joycea H. P. Linder | Rytidosperma Steud. | | | Joycea H. P. Linder | Rytidosperma Steud. |
| Kalinia H. L. Bell & Columbus | | a | | Kalinia H. L. Bell & Columbus | |
| Kampmannia Steud. | Cortaderia Stapf | | | Kampmannia Steud. | Cortaderia Stapf |
| Kampochloa Clayton | | a | | Kampochloa Clayton | |
| Kaokochloa De Winter | | a | | Kaokochloa De Winter | |
| Karroochloa Conert & Turpe | Tribolium Desv. | | | Karroochloa Conert & Turpe | Tribolium Desv. |
| Kellochloa Lizarazu et al. | | a | | Kellochloa Lizarazu et al. | |
| Kengia Packer | | a | | Kengia Packer | |
| Kengyilia C. Yen & J. L. Yang | | a | | Kengyilia C. Yen & J. L. Yang | |
| Keniochloa Melderis | Colpodium Trin. | | | Keniochloa Melderis | Colpodium Trin. |
| Keratochlaena Morrone & Zuloaga | | a | | Keratochlaena Morrone & Zuloaga | |
| Kerinozoma Steud. | Xerochloa R. Br. | | | Kerinozoma Steud. | Xerochloa R. Br. |
| Kerriochloa C. E. Hubb. | | a | | Kerriochloa C. E. Hubb. | |
| Kielboul Adans. | Aristida L. | | | Kielboul Adans. | Aristida L. |
| Kiharapyrum A. Love | Aegilops L. | | | Kiharapyrum A. Love | Aegilops L. |
| Kikuyuochloa H. Scholz | Pennisetum Rich. | | | Kikuyuochloa H. Scholz | Pennisetum Rich. |
| Kinabaluchloa K. M. Wong | | a | | Kinabaluchloa K. M. Wong | |
| Klemachloa R. Parker | Dendrocalamus Nees | | | Klemachloa R. Parker | Dendrocalamus Nees |
| Knappia Sm. | Mibora Adans. | | | Knappia Sm. | Mibora Adans. |
| Koeleria Pers. | | a | | Koeleria Pers. | |
| Koordersiochloa Merr. | Streblochaete Hochst. ex Pilg. | | | Koordersiochloa Merr. | Streblochaete Hochst. ex Pilg. |
| Korycarpus Lag. | Diarrhena P. Beauv. | | | Korycarpus Lag. | Diarrhena P. Beauv. |
| Kralikia Coss. & Durieu | Tripogon Roem. & Schult. | | | Kralikia Coss. & Durieu | Tripogon Roem. & Schult. |
| Kralikiella Batt. & Trab. | Tripogon Roem. & Schult. | | | Kralikiella Batt. & Trab. | Tripogon Roem. & Schult. |
| Kratzmannia Opiz, nom. inval. | Agropyron Gaertn. | | | Kratzmannia Opiz, nom. inval. | Agropyron Gaertn. |
| Krombholzia E. Fourn. | Zeugites P. Browne | | | Krombholzia E. Fourn. | Zeugites P. Browne |
| Ktenosachne Steud. | Rostraria Trin. | | | Ktenosachne Steud. | Rostraria Trin. |
| Kuruna Attigala et al. | | a | | Kuruna Attigala et al. | |
| Lachnagrostis Trin. | Agrostis L. | | | Lachnagrostis Trin. | Agrostis L. |
| Lachryma-jobi Ortega | Coix L. | | | Lachryma-jobi Ortega | Coix L. |
| Lachrymaria Heist. ex Fabr. | Coix L. | | | Lachrymaria Heist. ex Fabr. | Coix L. |
| Lacryma Medik. | Coix L. | | | Lacryma Medik. | Coix L. |
| Laegaardia P. M. Peterson et al. | | a | | Laegaardia P. M. Peterson et al. | |
| Laertia Gromov, orth. var. | Leersia Sw. | | | Laertia Gromov, orth. var. | Leersia Sw. |
| Lagurus L. | | a | | Lagurus L. | |
| Lamarckia Moench | | a | | Lamarckia Moench | |
| Lamarkia Moench, orth. var. | Lamarckia Moench | | | Lamarkia Moench, orth. var. | Lamarckia Moench |
| Lamprothyrsus Pilg. | Cortaderia Stapf | | | Lamprothyrsus Pilg. | Cortaderia Stapf |
| Langsdorffia Regel, nom. inval. | Eustachys Desv. | | | Langsdorffia Regel, nom. inval. | Eustachys Desv. |
| Lappago Schreb. | Tragus Haller | | | Lappago Schreb. | Tragus Haller |
| Lappagopsis Steud. | Axonopus P. Beauv. | | | Lappagopsis Steud. | Axonopus P. Beauv. |
| Lasiacis (Griseb.) Hitchc. | | a | | Lasiacis (Griseb.) Hitchc. | |
| Lasiagrostis Link | Stipa L. | | | Lasiagrostis Link | Stipa L. |
| Lasiochloa Kunth | Tribolium Desv. | | | Lasiochloa Kunth | Tribolium Desv. |
| Lasiolytrum Steud. | Arthraxon P. Beauv. | | | Lasiolytrum Steud. | Arthraxon P. Beauv. |
| Lasiorhachis (Hack.) Stapf | Saccharum L. | | | Lasiorhachis (Hack.) Stapf | Saccharum L. |
| Lasiostega Benth., nom. inval. | Bouteloua Lag. | | | Lasiostega Benth., nom. inval. | Bouteloua Lag. |
| Lasiotrichos Lehm., nom. inval. | Fingerhuthia Nees | | | Lasiotrichos Lehm., nom. inval. | Fingerhuthia Nees |
| Lasiurus Boiss. | | a | | Lasiurus Boiss. | |
| Laston Pau | Festuca L. | | | Laston Pau | Festuca L. |
| Latipes Kunth | Leptothrium Kunth | | | Latipes Kunth | Leptothrium Kunth |
| Lechlera Steud., nom. inval. | Relchela Steud. | | | Lechlera Steud., nom. inval. | Relchela Steud. |
| Lecomtella A. Camus | | a | | Lecomtella A. Camus | |
| Leersia Sw. | | a | | Leersia Sw. | |
| Leiopoa Ohwi | Festuca L. | | | Leiopoa Ohwi | Festuca L. |
| Leleba Nakai | Bambusa Schreb. | | | Leleba Nakai | Bambusa Schreb. |
| Lenormandia Steud., nom. inval. | Chrysopogon Trin. | | | Lenormandia Steud., nom. inval. | Chrysopogon Trin. |
| Lepargochloa Launert | Loxodera Launert | | | Lepargochloa Launert | Loxodera Launert |
| Lepeocercis Trin. | Dichanthium Willemet | | | Lepeocercis Trin. | Dichanthium Willemet |
| Lepideilema Trin. | Streptochaeta Schrad. ex Nees | | | Lepideilema Trin. | Streptochaeta Schrad. ex Nees |
| Lepidopironia A. Rich. | Tetrapogon Desf. | | | Lepidopironia A. Rich. | Tetrapogon Desf. |
| Lepidurus Janch., nom. inval. | Parapholis C. E. Hubb. | | | Lepidurus Janch., nom. inval. | Parapholis C. E. Hubb. |
| Lepitoma Steud., nom. inval. | Pleuropogon R. Br. | | | Lepitoma Steud., nom. inval. | Pleuropogon R. Br. |
| Lepiurus Dumort. | Lepturus R. Br. | | | Lepiurus Dumort. | Lepturus R. Br. |
| Leptagrostis C. E. Hubb. | | a | | Leptagrostis C. E. Hubb. | |
| Leptaspis R. Br. | | a | | Leptaspis R. Br. | |
| Leptatherum Nees | | a | | Leptatherum Nees | |
| Leptocanna L. C. Chia & H. L. Fung | Schizostachyum Nees | | | Leptocanna L. C. Chia & H. L. Fung | Schizostachyum Nees |
| Leptocarydion Hochst. ex Stapf | | a | | Leptocarydion Hochst. ex Stapf | |
| Leptocercus Raf. | Lepturus R. Br. | | | Leptocercus Raf. | Lepturus R. Br. |
| Leptochloa P. Beauv. | | a | | Leptochloa P. Beauv. | |
| Leptochloopsis H. O. Yates | Uniola L. | | | Leptochloopsis H. O. Yates | Uniola L. |
| Leptochloris Kuntze, nom. inval. | Trichloris E. Fourn. ex Benth. | | | Leptochloris Kuntze, nom. inval. | Trichloris E. Fourn. ex Benth. |
| Leptocoryphium Nees | Anthenantia P. Beauv. | | | Leptocoryphium Nees | Anthenantia P. Beauv. |
| Leptoloma Chase | Digitaria Haller | | | Leptoloma Chase | Digitaria Haller |
| Leptophyllochloa C. E. Calderon ex Nicora | | a | | Leptophyllochloa C. E. Calderon ex Nicora | |
| Leptopogon Roberty | Andropogon L. | | | Leptopogon Roberty | Andropogon< |