Glyceria laxa (Lamson-Scribner) Lamson-Scribner. Phen: Jun-Aug. Hab: Bogs, fens, seeps, wet meadows. Dist: PE south to NC, mostly Appalachian.
Origin/Endemic status: Native
Taxonomy Comments: Though often described as a hybrid of G. canadensis and either G. striata var. striata and/or G. grandis var. grandis, G. laxa ranges south of the distribution of both G. canadensis and G. grandis var. grandis. It is best considered as a species, perhaps of hybrid origin.
Synonymy: = F, G, K1, K3, K4, NE, NY, Va, WV; = Glyceria ×laxa – C; = Glyceria canadensis × grandis – Pa; = Glyceria canadensis (Michx.) Trin. var. laxa (Scribn.) Hitchc. – FNA24, HC, RAB, Tn; < Glyceria canadensis (Michx.) Trin. – GW1