Setaria faberi
Setaria subg. Setaria
Chinese foxtail, Chinese millet, foxtail, giant bristlegrass, giant foxtail, Japanese bristlegrass, setaire géante
50-200 cm.
glabrous, fringed with white hairs;
ligules about 2 mm;
blades 15-30 cm long, 10-20 mm wide, usually with soft hairs on the adaxial surface.
seldom wider than 20 mm, flat or loosely twisted.
6-20 cm, densely spicate, arching and drooping from near the base;
rachises densely villous;
bristles (1)3(6), about 10 mm.
usually contracted, spikelike;
branches short, with 1 or more bristles subtending each spikelet.
2.5-3 mm.
obtuse or acutish.
about 1 mm, acute, 3-veined;
upper glumes about 2.2 mm, obtuse, 5-veined;
lower lemmas about 2.8 mm, obtuse;
lower paleas about 2/3 as long as the lower lemmas;
upper lemmas pale, finely and distinctly transversely rugose;
upper paleas similar to the upper lemmas.
lemmas transversely rugose, rarely smooth.
= 36.
Setaria faberi
Setaria subg. Setaria
Setaria faberi spread rapidly throughout the North American corn belt after being accidentally introduced from China in the 1920s. It has become a major nuisance in corn and bean fields of the midwestern United States.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Setaria subg. Setaria is represented in subtropical and temperate regions throughout the world and is the best represented subgenus in the Flora region.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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