Paspalum repens |
Paspalum vaginatum |
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water paspalum |
saltwater couch, seashore paspalum |
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Habit | Plants annual; aquatic, floating or rhizomatous. | Plants perennial; rhizomatous and/or stoloniferous. |
Culms | 4-55 cm, erect; nodes pubescent. |
10-79 cm, erect; nodes glabrous. |
Sheaths | glabrous or pubescent; ligules 1-4 mm; blades 10-40 cm long, 8-22 mm wide, flat, glabrous or sparsely pubescent. |
glabrous, sparsely long pubescent distally; ligules 1-2 mm; blades 10-19 cm long, 1.4-8 mm wide, flat or conduplicate, glabrous or pubescent, apices involute. |
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, usually composed of a digitate pair of branches, a third branch sometimes present below; branches 1.1-7.9 cm, diverging to erect; branch axes 0.4-1.4 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. |
3-4.5 mm long, 1.1-2 mm wide, solitary, appressed to the branch axes, elliptic-lanceolate, glabrous, light stramineous, apices acute to acuminate. |
Lower glumes | absent; upper glumes and lower lemmas veinless; upper florets white. |
absent (rarely present); upper glumes and lower lemmas glabrous, 3-veined; upper florets white. |
Caryopses | 0.8-0.9 mm, translucent, white. |
2.8-3.1 mm, yellow. |
2n | = 20. |
= 20, 40, 60. |
Paspalum repens |
Paspalum vaginatum |
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Distribution |
AL; CA; FL; GA; LA; MS; NC; SC; TX; HI; PR; Virgin Islands
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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 vaginatum grows in brackish and salt marshes. It is native to warm, coastal regions around the world, including the Americas. It has been grown for turf and in lawn trials, but is not yet widely used for these purposes. (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 | Sw. |
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