Calamagrostis californica Kearney
Calamagrostis canadensis (Michx.) Beauv. var. acuminata Vasey ex Shear & Rydb. [HC]
Calamagrostis canadensis (Michx.) P. Beauv. var. arcta Stebbins
Calamagrostis chordorrhiza A.E. Porsild
Calamagrostis crassiglumis Thurb. [HC]
Calamagrostis expansa Rickett & Gilly
Calamagrostis fernaldii Louis-Marie
Calamagrostis hyperborea Lange
Calamagrostis hyperborea Lange var. americana (Vasey) Kearney
Calamagrostis hyperborea Lange var. elongata Kearney
Calamagrostis hyperborea Lange var. stenodes Kearney
Calamagrostis inexpansa A. Gray [HC]
Calamagrostis inexpansa A. Gray var. barbulata Kearney [HC]
Calamagrostis inexpansa A. Gray var. brevior (Vasey) Stebbins
Calamagrostis inexpansa A. Gray var. inexpansa [HC]
Calamagrostis inexpansa A. Gray var. novae-angliae Stebbins
Calamagrostis inexpansa A. Gray var. robusta (Vasey) Stebbins
Calamagrostis labradorica Kearney
Calamagrostis lacustris (Kearney) Nash
Calamagrostis lapponica (Wahlenb.) Hartm. var. brevipilis Stebbins
Calamagrostis pickeringii A. Gray var. lacustris (Kearney) Hitchc.
Calamagrostis stricta (Timm) Koeler var. brevior Vasey
Calamagrostis stricta (Timm) Koeler var. lacustris (Kearney) C.W. Greene