Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. fasciculatum (Torrey) Freckmann. Slender-stemmed Witchgrass. Phen: May-Aug. Hab: Open or cut-over woods, thickets, fields, meadows, and shores, frequently on disturbed soils. Dist: NL (Newfoundland) south to FL, west to CA, north to s. BC.

ID notes:Typically much less pilose than var. acuminatum, the hairs usually papillate. Plants referable to Panicum glutinoscabrum Fernald may be a hybrid of var. fasciculatum with D. scoparium. Known only from se. VA, they are described as having culms 7-9 dm high; elongate internodes with cinereous puberulence and black, warty, viscid glands; villous nodes; glutinous-warty and scabrous sheaths and blades; ligule 4-5 mm long; minutely puberulent panicle axis; spikelets ellipsoid, subacute, 1.7-1.8 mm long, pubescent; first glume subacute, 0.6-0.7 mm long.

Origin/Endemic status: Native

Synonymy: = Il, Va, Freckmann (1981); = Dichanthelium acuminatum (Sw.) Gould & C.A.Clark ssp. fasciculatum (Torr.) Freckmann & Lelong – FNA25; = Panicum fasciculatum Torr.; < Dichanthelium acuminatum (Sw.) Gould & C.A.Clark – Mex, Pa; < Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. acuminatum – K3; >< Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. acuminatum – K1, Gould & Clark (1978); >< Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. implicatum (Scribn.) Gould & Clark – K1, Gould & Clark (1978); < Panicum acuminatum Sw. var. acuminatum – NcTx; > Panicum acuminatum Sw. var. fasciculatum (Torr.) Lelong – Lelong (1984); > Panicum acuminatum Sw. var. unciphyllum (Trin.) Lelong – Lelong (1984); >? Panicum glutinoscabratum Fernald; > Panicum huachucae Ashe – WV; > Panicum huachucae Ashe var. fasciculatum (Torr.) Hubb. – HC; > Panicum huachucae Ashe var. huachucae – HC, S; > Panicum huachucae Ashe var. silvicola Hitchc. & Chase – S; > Panicum implicatum Sw. – HC, NY, WV; < Panicum lanuginosum Elliott – RAB; > Panicum lanuginosum Elliott var. fasciculatum (Torr.) Fernald – C, F, G; > Panicum lanuginosum Elliott var. implicatum (Scribn.) Fernald – C, F, G; > Panicum lanuginosum Elliott var. tennesseense (Ashe) Gleason – C, G; > Panicum tennesseense Ashe – HC, S

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Wetland Indicator Status:

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

Heliophily: 7