Paspalum repens |
Paspalum urvillei |
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water paspalum |
Vasey grass, Vasey's grass |
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Habit | Plants annual; aquatic, floating or rhizomatous. | Plants perennial; cespitose, with a knotty base composed of very short (less than 1 cm) rhizomes. |
Culms | 4-55 cm, erect; nodes pubescent. |
50-220 cm, erect; nodes glabrous or pubescent. |
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 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. |
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, 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. |
Spikelets | 1.1-1.9 mm long, 0.5-0.8 mm wide, solitary, appressed to the branch axes, elliptic, pubescent, white. |
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). |
Lower glumes | absent; upper glumes and lower lemmas veinless; upper florets white. |
absent; upper glumes and lower lemmas 3-veined, margins pilose; upper florets stramineous. |
Caryopses | 0.8-0.9 mm, translucent, white. |
1.2-1.7 mm, white. |
2n | = 20. |
= 40. |
Paspalum repens |
Paspalum urvillei |
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Distribution |
AL; AR; CA; FL; GA; KS; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA; HI; PR
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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 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.) |
Source | FNA vol. 25, p. 571. | FNA vol. 25. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Synonyms | P. repens var. fluitans, P. fluitans | |
Name authority | P.J. Bergius | Steud. |
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