Paspalum setaceum |
Paspalum setaceum var. ciliatifolium |
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fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
fringeleaf paspalum |
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Habit | Plants perennial; cespitose or shortly rhizomatous. | Plants erect to spreading. | ||||||||||||||||||||||||||||||||||||
Culms | 25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
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Sheaths | glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
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Leaves | mostly cauline; blades 2-32 cm long, 3-18 mm wide, lax to somewhat stiff, glabrous or with a few hairs along the midrib (rarely shortly pilose), dark green to purple, margins scabrous, ciliate. |
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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. |
1.7-2 mm long, 1.2-1.5 mm wide, elliptic to obovate, pubescent or occasionally glabrous; lower lemmas with an evident midvein; upper florets 1.7-2 mm. |
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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. |
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Caryopses | elliptic to suborbicular, white. |
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Panicle(s) | 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. |
branches 2-11.9 cm; branch axes 0.6-1.2 mm wide. |
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2n | = 20. |
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Paspalum setaceum |
Paspalum setaceum var. ciliatifolium |
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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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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 setaceum var. ciliatifolium is the most variable and widespread of the nine varieties of P. setaceum. It usually grows in sandy soil in open areas, including disturbed areas, of prairies and forest margins. Its range extends from Louisiana and the eastern United States to Panama, the West Indies, and Bermuda. (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, p. 590. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum > Paspalum setaceum | ||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||
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Synonyms | P. eggertii, P. ciliatifolium | |||||||||||||||||||||||||||||||||||||
Name authority | Michx. | (Michx.) Vasey | ||||||||||||||||||||||||||||||||||||
Web links |
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