Paspalum repens |
Paspalum setaceum |
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water paspalum |
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
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Habit | Plants annual; aquatic, floating or rhizomatous. | Plants perennial; cespitose or shortly rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 4-55 cm, erect; nodes pubescent. |
25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
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Sheaths | glabrous or pubescent; ligules 1-4 mm; blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely pubescent. |
glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
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Panicles | 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. |
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. |
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Spikelets | 1.1-1.9 mm long, 0.5-0.8 mm wide, solitary, appressed to the branch axes, elliptic, pubescent, white. |
1.4-2.6 mm long, paired, imbricate, appressed to the branch axes, elliptic to obovate to ovate to orbicular, stramineous or brown. |
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Lower glumes | absent; upper glumes and lower lemmas veinless; upper florets white. |
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 | 0.8-0.9 mm, translucent, white. |
elliptic to suborbicular, white. |
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2n | = 20. |
= 20. |
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Paspalum repens |
Paspalum setaceum |
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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 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.) |
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.) |
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Key |
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Source | FNA vol. 25, p. 571. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
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 | P.J. Bergius | Michx. | ||||||||||||||||||||||||||||||||||||
Web links |
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