Setaria viridis |
Setaria viridis var. viridis |
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green bristle grass, green foxtail, setaire verte |
green bristlegrass, green foxtail |
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Habit | Plants annual. | |||||
Culms | 20-250 cm; nodes glabrous. |
20-100 cm; nodes 6-7. |
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Sheaths | glabrous, sometimes scabridu-lous, margins ciliate distally; ligules 1-2 mm, ciliate; blades to 20 cm long, 4-25 mm wide, flat, scabrous or smooth, glabrous. |
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Blades | 4-12 mm wide. |
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Panicles | 3-20 cm, densely spicate, nodding only from near the apices; rachises hispid and villous; bristles 1-3, 5-10 mm, antrorsely scabrous, usually green, rarely purple. |
usually 3-8 cm, producing around 600-800 caryopses. |
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Spikelets | 1.8-2.2 mm. |
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Lower glumes | about as long as the spikelets, triangular-ovate, 3-veined; upper glumes nearly equaling the upper lemmas, elliptical, 5-6-veined; lower lemmas slightly exceeding the upper lemmas, 5-veined; lower paleas about as long as the lower lemmas, hyaline; upper lemmas very finely and transversely rugose, pale green, 5-6-veined; upper paleas similar to the upper lemmas. |
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2n | = 18. |
= 18. |
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Setaria viridis |
Setaria viridis var. viridis |
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Distribution |
AK; 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; AB; BC; LB; MB; NB; NS; NT; ON; PE; QC; SK; YT
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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; AB; BC; LB; MB; NB; NS; NT; ON; PE; QC; SK; YT |
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Discussion | Setaria viridis resembles S. italica but differs in its shorter spikelets and rugose upper florets, and mode of disarticulation. It is also a more aggressive weed. It is native to Eurasia but is now widespread in warm temperate regions of the world. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Setaria viridis var. viridis is an aggressive adventive weed throughout temperate North America. It is the most common annual representative of Setaria in the Flora region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 554. | FNA vol. 25, p. 556. | ||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria > Setaria viridis | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | S. viridis var. weinmannii | |||||
Name authority | (L.) P. Beauv. | unknown | ||||
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