| Calamagrostis angustifolia Kom. | Calamagrostis purpurea (Trin.) Trin. subsp. purpurea | | | Calamagrostis angustifoliaKom. | Calamagrostis purpurea(Trin.) Trin. subsp. purpurea |
| Calamagrostis arundinacea (L.) Roth | | a | | Calamagrostis arundinacea(L.) Roth | |
| Calamagrostis arundinacea (L.) Roth var. brachytricha (Steud.) Hack. | | a | i | Calamagrostis arundinacea(L.) Roth var.brachytricha (Steud.) Hack. | |
| Calamagrostis arundinacea (L.) Roth var. sciuroides (Franch. & Sav.) Hack. | | a | i | Calamagrostis arundinacea(L.) Roth var.sciuroides (Franch. & Sav.) Hack. | |
| Calamagrostis brachytricha Steud. | Calamagrostis arundinacea (L.) Roth var. brachytricha (Steud.) Hack. | | | Calamagrostis brachytrichaSteud. | Calamagrostis arundinacea(L.) Roth var.brachytricha (Steud.) Hack. |
| Calamagrostis canadensis (Michx.) P. Beauv. | | a | | Calamagrostis canadensis(Michx.) P. Beauv. | |
| Calamagrostis canescens (Weber ex F. H. Wigg.) Roth | | a | | Calamagrostis canescens(Weber ex F. H. Wigg.) Roth | |
| Calamagrostis coarctata Eaton | | a | | Calamagrostis coarctataEaton | |
| Calamagrostis compacta (Munro ex Hook. f.) Hack. ex Paulsen | | a | | Calamagrostis compacta(Munro ex Hook. f.) Hack. ex Paulsen | |
| Calamagrostis emodensis Griseb. | | a | | Calamagrostis emodensisGriseb. | |
| Calamagrostis epigejos (L.) Roth | | a | | Calamagrostis epigejos(L.) Roth | |
| Calamagrostis inexpansa A. Gray | Calamagrostis stricta (Timm) Koeler subsp. inexpansa (A. Gray) C. W. Greene | | | Calamagrostis inexpansaA. Gray | Calamagrostis stricta(Timm) Koeler subsp. inexpansa (A. Gray) C. W. Greene |
| Calamagrostis lanceolata Roth | Calamagrostis canescens (Weber ex F. H. Wigg.) Roth | | | Calamagrostis lanceolataRoth | Calamagrostis canescens(Weber ex F. H. Wigg.) Roth |
| Calamagrostis langsdorffii (Link) Trin. | Calamagrostis canadensis (Michx.) P. Beauv. var. langsdorffii (Link) Inman | | | Calamagrostis langsdorffii(Link) Trin. | Calamagrostis canadensis(Michx.) P. Beauv. var.langsdorffii (Link) Inman |
| Calamagrostis lapponica (Wahlenb.) Hartm. | | a | | Calamagrostis lapponica(Wahlenb.) Hartm. | |
| Calamagrostis longearistata (Wedd.) Hack. ex Sodiro | | a | | Calamagrostis longearistata(Wedd.) Hack. ex Sodiro | |
| Calamagrostis montevidensis Nees | Calamagrostis viridiflavescens (Poir.) Steud. var. montevidensis (Nees) Kampf | | | Calamagrostis montevidensisNees | Calamagrostis viridiflavescens(Poir.) Steud. var.montevidensis (Nees) Kampf |
| Calamagrostis neglecta auct. | Calamagrostis stricta (Timm) Koeler subsp. stricta | | | Calamagrostis neglectaauct. | Calamagrostis stricta(Timm) Koeler subsp. stricta |
| Calamagrostis nepalensis Nees | Calamagrostis pseudophragmites (Haller f.) Koeler | | | Calamagrostis nepalensisNees | Calamagrostis pseudophragmites(Haller f.) Koeler |
| Calamagrostis nutkaensis (J. Presl) Steud. | | a | | Calamagrostis nutkaensis(J. Presl) Steud. | |
| Calamagrostis pseudophragmites (Haller f.) Koeler | | a | | Calamagrostis pseudophragmites(Haller f.) Koeler | |
| Calamagrostis purpurea (Trin.) Trin. | | a | | Calamagrostis purpurea(Trin.) Trin. | |
| Calamagrostis sciuroides Franch. & Sav. | Calamagrostis arundinacea (L.) Roth var. sciuroides (Franch. & Sav.) Hack. | | | Calamagrostis sciuroidesFranch. & Sav. | Calamagrostis arundinacea(L.) Roth var.sciuroides (Franch. & Sav.) Hack. |
| Calamagrostis tolucensis (Kunth) Trin. ex Steud. | | a | | Calamagrostis tolucensis(Kunth) Trin. ex Steud. | |
| Calamagrostis varia (Schrad.) Host | | a | | Calamagrostis varia(Schrad.) Host | |
| Calamagrostis viridiflavescens (Poir.) Steud. | | a | | Calamagrostis viridiflavescens(Poir.) Steud. | |
| Calamagrostis youngii (Hook. f.) Skeels | | a | | Calamagrostis youngii(Hook. f.) Skeels | |
| Calamagrostis alba (J. Presl) Steud. | | a | | Calamagrostis alba(J. Presl) Steud. | |
| Calamagrostis stricta (Timm) Koeler | | a | | Calamagrostis stricta(Timm) Koeler | |
| Calamagrostis spp. | | a | | Calamagrostis spp. | |
| Calamagrostis armata (Doll) Parodi | Calamagrostis alba (J. Presl) Steud. | | | Calamagrostis armata(Doll) Parodi | Calamagrostis alba(J. Presl) Steud. |
| Calamagrostis montevidensis Nees var. armata Doll | Calamagrostis alba (J. Presl) Steud. | | i | Calamagrostis montevidensisNees var.armata Doll | Calamagrostis alba(J. Presl) Steud. |
| Calamagrostis parsana (Bor) Dogan | | a | | Calamagrostis parsana(Bor) Dogan | |
| Calamagrostis avenoides (Hook. f.) Cockayne | | a | | Calamagrostis avenoides(Hook. f.) Cockayne | |
| Calamagrostis ×acutiflora (Schrad.) Rchb. | | a | | Calamagrostis acutiflora(Schrad.) Rchb. | |
| Calamagrostis insperata Swallen | Calamagrostis porteri A. Gray subsp. insperata (Swallen) C. W. Greene | | | Calamagrostis insperataSwallen | Calamagrostis porteriA. Gray subsp. insperata (Swallen) C. W. Greene |
| Calamagrostis gigantea Nutt. | Calamovilfa gigantea (Nutt.) Scribn. & Merr. | | | Calamagrostis giganteaNutt. | Calamovilfa gigantea(Nutt.) Scribn. & Merr. |
| Calamagrostis longifolia Hook. | Calamovilfa longifolia (Hook.) Scribn. | | | Calamagrostis longifoliaHook. | Calamovilfa longifolia(Hook.) Scribn. |
| Calamagrostis rubescens Buckley | | a | | Calamagrostis rubescensBuckley | |
| Calamagrostis viridiflavescens (Poir.) Steud. var. montevidensis (Nees) Kampf | | a | i | Calamagrostis viridiflavescens(Poir.) Steud. var.montevidensis (Nees) Kampf | |
| Calamagrostis purpurea (Trin.) Trin. subsp. purpurea | | a | i | Calamagrostis purpurea(Trin.) Trin. subsp. purpurea | |
| Calamagrostis purpurea (Trin.) Trin. subsp. phragmitoides (Hartm.) Tzvelev | | a | i | Calamagrostis purpurea(Trin.) Trin. subsp. phragmitoides (Hartm.) Tzvelev | |
| Calamagrostis phragmitoides Hartm. | Calamagrostis purpurea (Trin.) Trin. subsp. phragmitoides (Hartm.) Tzvelev | | | Calamagrostis phragmitoidesHartm. | Calamagrostis purpurea(Trin.) Trin. subsp. phragmitoides (Hartm.) Tzvelev |
| Calamagrostis epigejos (L.) Roth subsp. macrolepis (Litv.) Tzvelev | | a | i | Calamagrostis epigejos(L.) Roth subsp. macrolepis (Litv.) Tzvelev | |
| Calamagrostis macrolepis Litv. | Calamagrostis epigejos (L.) Roth subsp. macrolepis (Litv.) Tzvelev | | | Calamagrostis macrolepisLitv. | Calamagrostis epigejos(L.) Roth subsp. macrolepis (Litv.) Tzvelev |
| Calamagrostis leonardii Chase | | a | | Calamagrostis leonardiiChase | |
| Calamagrostis fibrovaginata Laegaard | | a | | Calamagrostis fibrovaginataLaegaard | |
| Calamagrostis coarctata (Kunth) Steud. | Calamagrostis fibrovaginata Laegaard | | | Calamagrostis coarctata(Kunth) Steud. | Calamagrostis fibrovaginataLaegaard |
| Calamagrostis cinnoides auct. | Calamagrostis coarctata Eaton | | | Calamagrostis cinnoidesauct. | Calamagrostis coarctataEaton |
| Calamagrostis hyperborea Lange | | a | | Calamagrostis hyperboreaLange | |
| Calamagrostis stricta (Timm) Koeler subsp. stricta | | a | i | Calamagrostis stricta(Timm) Koeler subsp. stricta | |
| Calamagrostis stricta (Timm) Koeler subsp. inexpansa (A. Gray) C. W. Greene | | a | i | Calamagrostis stricta(Timm) Koeler subsp. inexpansa (A. Gray) C. W. Greene | |
| Calamagrostis plumosa Spreng. | Jarava plumosa (Spreng.) S. W. L. Jacobs & J. Everett | | | Calamagrostis plumosaSpreng. | Jarava plumosa(Spreng.) S. W. L. Jacobs & J. Everett |
| Calamagrostis porteri A. Gray | | a | | Calamagrostis porteriA. Gray | |
| Calamagrostis porteri A. Gray subsp. porteri | | a | i | Calamagrostis porteriA. Gray subsp. porteri | |
| Calamagrostis porteri A. Gray subsp. insperata (Swallen) C. W. Greene | | a | i | Calamagrostis porteriA. Gray subsp. insperata (Swallen) C. W. Greene | |
| Calamagrostis foliosa Kearney | | a | | Calamagrostis foliosaKearney | |
| Calamagrostis andina Nutt. | Muhlenbergia andina (Nutt.) Hitchc. | | | Calamagrostis andinaNutt. | Muhlenbergia andina(Nutt.) Hitchc. |
| Calamagrostis purpurea (Trin.) Trin. subsp. langsdorffii (Link) Tzvelev | Calamagrostis canadensis (Michx.) P. Beauv. var. langsdorffii (Link) Inman | | i | Calamagrostis purpurea(Trin.) Trin. subsp. langsdorffii (Link) Tzvelev | Calamagrostis canadensis(Michx.) P. Beauv. var.langsdorffii (Link) Inman |
| Calamagrostis canadensis (Michx.) P. Beauv. var. canadensis | | a | i | Calamagrostis canadensis(Michx.) P. Beauv. var.canadensis | |
| Calamagrostis canadensis (Michx.) P. Beauv. var. langsdorffii (Link) Inman | | a | i | Calamagrostis canadensis(Michx.) P. Beauv. var.langsdorffii (Link) Inman | |
| Calamagrostis purpurascens R. Br. | | a | | Calamagrostis purpurascensR. Br. | |
| Calamagrostis agrostiflora Beck | Agrostis schraderiana Bech. | | | Calamagrostis agrostifloraBeck | Agrostis schraderianaBech. |
| Calamagrostis brassii Hitchc. | | a | | Calamagrostis brassiiHitchc. | |
| Calamagrostis quadriseta (Labill.) Spreng. | | a | | Calamagrostis quadriseta(Labill.) Spreng. | |