Paspalum setaceum |
Paspalum repens |
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fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
water paspalum |
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Habit | Plants perennial; cespitose or shortly rhizomatous. | Plants annual; aquatic, floating or rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
4-55 cm, erect; nodes 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 mm; blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely pubescent. |
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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 (7)20-70 racemosely arranged branches; branches 1.2-9.5 cm, diverging to spreading, occasionally arcuate, disarticulating at maturity; branch axes 0.7-1.5 mm wide, broadly winged, glabrous, margins scabrous, extending beyond the distal 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. |
1.1-1.9 mm long, 0.5-0.8 mm wide, solitary, appressed to the branch axes, elliptic, pubescent, white. |
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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 veinless; upper florets white. |
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Caryopses | elliptic to suborbicular, white. |
0.8-0.9 mm, translucent, white. |
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2n | = 20. |
= 20. |
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Paspalum setaceum |
Paspalum repens |
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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 repens is a native species that grows along the edges of lakes, streams, and roadside ditches in the southeastern United States. Its range extends through tropical America to Peru, Bolivia, and Argentina. (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. 571. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
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Synonyms | P. repens var. fluitans, P. fluitans | |||||||||||||||||||||||||||||||||||||
Name authority | Michx. | P.J. Bergius | ||||||||||||||||||||||||||||||||||||
Web links |
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