Paspalum setaceum |
Paspalum urvillei |
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fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
Vasey grass, Vasey's grass |
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Habit | Plants perennial; cespitose or shortly rhizomatous. | Plants perennial; cespitose, with a knotty base composed of very short (less than 1 cm) rhizomes. | ||||||||||||||||||||||||||||||||||||
Culms | 25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
50-220 cm, erect; nodes glabrous or pubescent. |
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Sheaths | glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
glabrous or pubescent; ligules 1-4(7.7) mm; blades 12-60 cm long, 2-12 mm wide, flat, mostly glabrous, a few long hairs near the base of the adaxial surface. |
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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 (4)10-30 racemosely arranged branches; branches 1.2-11.5 cm, divergent; branch axes 0.5-1.1 mm wide, winged, glabrous, margins scabrous, 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. |
1.8-2.8 mm long, 1.1-1.5 mm wide, paired, appressed to the branch axes, elliptic to slightly obovate, stramineous (rarely purple). |
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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 3-veined, margins pilose; upper florets stramineous. |
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Caryopses | elliptic to suborbicular, white. |
1.2-1.7 mm, white. |
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2n | = 20. |
= 40. |
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Paspalum setaceum |
Paspalum urvillei |
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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; AR; CA; FL; GA; KS; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA; HI; PR
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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 urvillei has been introduced to the United States from South America. In the Flora region it grows in disturbed, moist to wet areas, primarily in the southeastern United States. (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 | ||||||||||||||||||||||||||||||||||||
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Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Name authority | Michx. | Steud. | ||||||||||||||||||||||||||||||||||||
Web links |
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