Panicum dichotomiflorum Michaux var. dichotomiflorum . Section: Dichotomiflora. Spreading Panic Grass, Fall Panic Grass. Phen: Mar-Nov. Hab: Marshy shores, exposed wet soils, alluvial deposits in floodplain forests, spoil banks, ditches. Dist: E. Canada west to BC, south to FL, TX, and Mexico; also in the Bahamas (Sorrie & LeBlond 1997).

Origin/Endemic status: Native

Taxonomy Comments: Plants with geniculate bases, enlarged lower nodes and sheaths, and panicles with included peduncles and divergent branches have been recognized as var. geniculatum (Alph. Wood) Fernald.

Synonymy: = FlGr, K4, NE; = Panicum dichotomiflorum Michx. ssp. dichotomiflorum – Ar, NY; < Panicum dichotomiflorum Michx. – C, ETx1, GW1, Mex, Mi, NcTx, Pa, RAB, S, Tn, Tx, WV, Lelong (1986); < Panicum dichotomiflorum Michx. ssp. dichotomiflorum – Zuloaga (2022); > Panicum dichotomiflorum Michx. ssp. dichotomiflorum – FNA25; Panicum dichotomiflorum Michx. var. dichotomiflorum; < Panicum dichotomiflorum Michx. var. dichotomiflorum – Va; > Panicum dichotomiflorum Michx. var. dichotomiflorum – F, G, Il, K1, K3, W; >< Panicum dichotomiflorum Michx. var. dichotomiflorum – HC; > Panicum dichotomiflorum Michx. var. geniculatum (Wood) Fernald – F, G, Il, W; > Panicum lacustre Hitchc. & Ekman – FNA25, HC, K1, K3

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