Checklist » Poaceae » Panicum dichotomiflorum ssp. dichotomiflorum
Last updated 7/24/2009 by David Giblin.
Panicum dichotomiflorum Michx. ssp. dichotomiflorum[FNA24, HC2]
fall panicum, western witchgrass

Publication: Fl. Bor.-Amer. 1: 48. 1803.

Origin: Introduced from eastern North America

selected vouchers: WTU

Notes: FNA24: "Panicum dichotomiflorum subsp. dichotomiflorum is the most common of the three subspecies and is found throughout the range of the species. In the past, members of this subspecies have been treated as two different taxa, var. geniculatum (Alph. Wood) Fernald and var. dichotomiflorum, with more erect, slender plants having fewer long-exserted panicles with slender, ascending branches and less crowded spikelets being placed in var. dichotomiflorum. Such plants are more common in the southern part of the subspeciesrange, but the traits are poorly correlated and the differences are at least in part affected by photoperiod, nighttime temperatures, and the time of seed germination."

References: (none)

Synonyms & Misapplied Names:
Panicum dichotomiflorum Michx. var. dichotomiflorum[KZ99]
S: Panicum dichotomiflorum Michx. var. geniculatum (Alph. Wood) Fernald