Setaria faberi |
Setaria megaphylla |
|
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Chinese foxtail, Chinese millet, foxtail, giant bristlegrass, giant foxtail, Japanese bristlegrass, setaire géante |
bigleaf bristlegrass |
|
Habit | Plants annual. | Plants perennial. |
Culms | 50-200 cm. |
100-200 cm, nodes villous. |
Sheaths | 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. |
sparsely strigose or glabrous; ligules about 2 mm, of hairs; blades 40-60 cm long, 20-80 mm wide, strongly plicate, with scattered hairs on each surface. |
Panicles | 6-20 cm, densely spicate, arching and drooping from near the base; rachises densely villous; bristles (1)3(6), about 10 mm. |
30-60 cm, lanceoloid; branches 2-5 cm, stiff; bristles solitary, usually present only below the terminal spikelet on each branch, occasionally below non-terminal spikelets, 1-1.5 cm. |
Spikelets | 2.5-3 mm. |
3-3.5 mm. |
Lower glumes | 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. |
1/2 as long as the spikelets, 3-veined; upper glumes 2/3 as long as the spikelets, 5-7-veined; lower lemmas equaling the upper lemmas, 5-veined; lower paleas absent or reduced to a small scale; upper lemmas about 3 mm, nearly smooth, shiny. |
2n | = 36. |
= 54. |
Setaria faberi |
Setaria megaphylla |
|
Distribution |
AL; AR; AZ; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; VA; VT; WI; WV; ON; QC
|
FL; LA |
Discussion | 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 megaphylla is a species of tropical Africa and tropical America that has become established in Florida. Hitchcock (1951) stated that S. poiretiana (Schult.) Kunth was occasionally cultivated in the United States, but he was referring to S. megaphylla. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 556. | FNA vol. 25, p. 543. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Ptychophyllum |
Sibling taxa | ||
Name authority | R.A.W. Herrm. | (Steud.) T. Durand & Schinz |
Web links |
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