Coleataenia rigidula (Bosc ex Nees) LeBlond ssp. rigidula . Redtop Panic Grass. Phen: Jul-Oct. Hab: Wet sandy or peaty soils low woods, meadows, marshes, shores, swamps, ditches, often weedy. Dist: ME and MI south to FL and TX; also in CA and BC; disjunct in Central America.

Origin/Endemic status: Native

Synonymy: = K3, K4, NY, Va, Weakley et al (2011); = Coleataenia rigidula (Bosc ex Nees) LeBlond – Il; = Panicum agrostoides Spreng. – S, WV; = Panicum agrostoides Spreng. var. agrostoides – G, RAB, Tat; = Panicum rigidulum Bosc ex Nees var. rigidulum – W; < Coleataenia longifolia (Torr.) Soreng ssp. rigidula (Bosc ex Nees) Soreng – Soreng (2010); < Coleataenia rigidula (Bosc ex Nees) LeBlond – FlGr; > Panicum agrostoides Spreng. var. agrostoides – F, HC; > Panicum agrostoides Spreng. var. ramosius (C.Mohr) Fernald – F, HC; < Panicum rigidulum Bosc ex Nees – C, GW1, Meso6, Mex, Mi, NcTx, Pa, Tx, WH3; < Panicum rigidulum Bosc ex Nees ssp. rigidulum – Ar, FNA25, Tn; < Panicum rigidulum Bosc ex Nees var. rigidulum – ETx1, K1, Lelong (1986); < Sorengia longifolia (Torr.) Zuloaga & Morrone ssp. rigidula (Bosc ex Nees) Zuloaga & Morrone – Zuloaga, Scataglini, & Morrone (2010)

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
• Great Plains: FACW (taxonomic split from wetland indicator species)
• Midwest: FACW (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily: 8