Paspalum setaceum |
Paspalum virgatum |
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fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
talquezal |
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Habit | Plants perennial; cespitose or shortly rhizomatous. | Plants perennial; cespitose. | ||||||||||||||||||||||||||||||||||||
Culms | 25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
100-200 cm, stout, erect; nodes glabrous. |
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Sheaths | glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
pubescent; ligules 1.9-2.2 mm, brown; blades 30-90 cm long, 1-3 cm wide, flat, glabrous, pubescent behind the ligules. |
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Panicles | terminal and axillary, with 1-6 racemosely axillary arranged branches, panicles partially or completely enclosed by the subtending leaf sheath; branches 2-12(17) cm, ascending to spreading, often arcuate, terminating in a spikelet; branch axes 0.2-1.2 mm wide, glabrous, sometimes scabrous. |
terminal, with 10-20 racemosely arranged branches; branches 3-15 cm, spreading to diverging; branch axes 1-1.7 mm wide, winged, wings narrower than the central section, terminating in a spikelet. |
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Spikelets | 1.4-2.6 mm long, paired, imbricate, appressed to the branch axes, elliptic to obovate to ovate to orbicular, stramineous or brown. |
2.2-3.2 mm long, 1.8-2.4 mm wide, paired, appressed to or diverging from the branch axes, obovate, brown. |
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Lower glumes | absent; upper glumes and lower lemmas glabrous or shortly glandular-pubescent, 3-veined, margins entire; lower lemmas lacking ribs over the veins; upper florets stramineous. |
absent; upper glumes and lower lemmas glabrous or variously short pubescent, 5-veined, margins entire; upper florets 2.5-2.7 mm, brown. |
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Caryopses | elliptic to suborbicular, white. |
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2n | = 20. |
= 36, 40, 54, 80. |
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Paspalum setaceum |
Paspalum virgatum |
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Distribution |
AL; AR; AZ; CO; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; PR; ON
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AL; GA; TX; PR; Virgin Islands |
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Discussion | Paspalum setaceum is a variable species that grows east of the Rocky Mountains in the contiguous United States and Mexico. The following treatment summarizes the major patterns of variation within the species. Some specimens will be hard to place, particularly old herbarium specimens that have lost their color. Nine varieties grow in the Flora region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Paspalum virgatum is native from Mexico to South America. It has been introduced to the southeastern United States, where it grows primarily in disturbed areas and cultivated fields. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Name authority | Michx. | L. | ||||||||||||||||||||||||||||||||||||
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