Setaria setosa |
Setaria pumila |
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West Indian bristlegrass, West Indies bristlegrass |
pigeon grass, wood groundsel, yellow bristlegrass, yellow foxtail |
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Habit | Plants perennial. | Plants annual. | ||||
Culms | 50-100 cm; nodes usually glabrous. |
30-130 cm. |
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Sheaths | glabrous or finely pubescent, margins ciliate distally; ligules of 1 mm hairs; blades 15-20 cm long, 6-12 mm wide, flat or folded, often finely pubescent on both surfaces. |
glabrous; ligules ciliate; blades 4-10 mm wide, loosely twisted, adaxial surfaces with papillose-based hairs basally. |
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Panicles | 15-20 cm, loosely spikelike, interrupted, attenuate; rachises often villous; branches ascending, lower branches about 2.5 cm; bristles usually solitary, less than 10 mm, antrorsely scabrous. |
3-15 cm, uniformly thick, erect, densely spicate; rachises hispid; bristles 4-12, 3-8 mm, antrorsely scabrous. |
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Spikelets | 2-2.5 mm, ovate-lanceolate. |
2-3.4 mm, strongly turgid. |
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Lower glumes | about 1/2 as long as the spikelets, 3-veined; upper glumes about 2/3 as long as the spikelets, 5-7-veined; lower lemmas equaling the upper lemmas; lower paleas as long as the upper paleas, broad; upper lemmas finely and distinctly transversely rugose. |
about 1/3 as long as the spikelets, 3-veined, acute; upper glumes about 1/2 as long as the spikelets, 5-veined, ovate; upper florets often staminate; lower lemmas equaling the upper lemmas; lower paleas equaling the lower lemmas, broad; upper lemmas conspicuously exposed, strongly transversely rugose. |
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2n | = unknown. |
= 36, 72. |
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Setaria setosa |
Setaria pumila |
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Distribution |
AL; FL; NJ; PR; Virgin Islands |
AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; HI; AB; BC; LB; MB; NB; NS; ON; PE; QC; SK
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Discussion | Setaria setosa is native to the West Indies and Mexico. It is probably a recent introduction to Florida, but appears to be established there. The specimen from New Jersey was from a ballast dump; the species is not established in that state. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 550. | FNA vol. 25, p. 558. | ||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | (Sw.) P. Beauv. | (Poir.) Roem. & Schult. | ||||
Web links |
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