Setaria parviflora |
Setaria scheelei |
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knot-root bristlegrass, knotroot foxtail, marsh bristle grass, yellow bristlegrass |
Souths estern bristlegrass, Southwestern bristlegrass |
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Habit | Plants perennial; rhizomatous, rhizomes short, knotty. | Plants perennial; cespitose. |
Culms | 30-120 cm; nodes glabrous. |
60-120 cm; nodes pilose, with appressed hairs. |
Sheaths | glabrous; ligules shorter than 1 mm, of hairs; blades to 25 cm long, 2-8 mm wide, flat, scabrous above. |
glabrous or hispid; ligules 1-2 mm, hispid; blades 15-30 cm long, 6-15 mm wide, flat or folded, scabrous, often pubescent. |
Panicles | 3-8 (10) cm, of uniform width throughout their length, densely spikelike; rachises scabro-hispid; bristles 4-12, 2-12 mm, antrorsely barbed, yellow to purple. |
15-25 cm, open, tapering from the base; rachises pubescent to villous; lower branches to 3 cm; bristles usually solitary, 10-35 mm, divergent. |
Spikelets | 2-2.8 mm, elliptical and turgid. |
2.2-2.5 mm, elliptical. |
Lower glumes | about 1/3 as long as the spikelets, 3-veined; upper glumes 1/2 - 2/3 as long as the spikelets, 5-veined; lower florets often staminate; lower lemmas occasionally indurate and faintly transversely rugose; lower paleas equaling the lower lemmas; upper lemmas distinctly transversely rugose, often purple-tipped. |
about 1/2 as long as the spikelets, 3-veined; upper glumes from 3/4 as long as to equaling the upper florets, 5-veined; lower lemmas equaling the upper lemmas, 5-veined; lower paleas about 1/2 as long as the upper paleas, lanceolate; upper lemmas finely cross-wrinkled, shortly apiculate; upper paleas ovate-lanceolate. |
2n | = 36, 72. |
= 54. |
Setaria parviflora |
Setaria scheelei |
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Distribution |
AL; AR; AZ; CA; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; MO; MS; NC; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; TN; TX; UT; VA; WA; WV; HI; PR; Virgin Islands
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AZ; TX
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Discussion | Setaria parviflora is a common, native species of moist ground. It is most frequent along the Atlantic and Gulf coasts, but it also grows from the Central Valley of California east through the central United States and southward through Mexico to Central America, as well as in the West Indies. The plant from Oregon was found on a ballast dump; the species is not established in that state. Setaria parviflora is the most morphologically diverse and widely distributed of the indigenous perennial species of Setaria. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Setaria scheelei grows in alluvial soils of canyons and river bottoms of New Mexico and Texas. Within the Flora region, it is particularly abundant in the limestone canyons of the Edwards Plateau of central Texas. Its range extends into central Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 556. | FNA vol. 25, p. 548. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria | Poaceae > subfam. Panicoideae > tribe Paniceae > Setaria > subg. Setaria |
Sibling taxa | ||
Synonyms | S. imberbis, S. gracilis, S. geniculata | |
Name authority | (Poir.) Kerguelen | (Steud.) Hitchc. |
Web links |
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