Paspalum repens |
Paspalum dilatatum |
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water paspalum |
Dallis grass, sticky heads |
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Habit | Plants annual; aquatic, floating or rhizomatous. | Plants perennial; cespitose, rhizomatous, rhizomes short (less than 1 cm), forming a knotty base. |
Culms | 4-55 cm, erect; nodes pubescent. |
50-175 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 or pubescent, lower sheaths more frequently pubescent than the upper sheaths; ligules 1.5-3.8 mm; blades to 35 cm long, 2-16.5 mm wide, flat, mostly glabrous, adaxial surfaces with a few long hairs near the base. |
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 2-7 racemosely arranged branches; branches 1.5-12 cm, racemose, divergent; branch axes 0.7-1.4 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. |
2.3-4 mm long, 1.7-2.5 mm wide, paired, appressed to the branch axes, ovate, tapering to an acute apex, stramineous (rarely purple). |
Lower glumes | absent; upper glumes and lower lemmas veinless; upper florets white. |
absent; upper glumes and lower lemmas 5-7-veined, margins pilose; upper florets stramineous. |
Caryopses | 0.8-0.9 mm, translucent, white. |
2-2.3 mm, white to brown. |
2n | = 20. |
= 20, 40, 50-63. |
Paspalum repens |
Paspalum dilatatum |
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Distribution |
AL; AR; AZ; CA; CO; DC; FL; GA; IL; KY; LA; MD; MO; MS; NC; NJ; NM; OK; OR; SC; TN; TX; VA; WV; 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 dilatatum is native to Brazil and Argentina. It is now well established in the Flora region, generally as a weed in waste places. It is also used as a turf grass. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 571. | FNA vol. 25, p. 579. |
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 | Poir. |
Web links |
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