Paspalum dilatatum |
Paspalum boscianum |
|
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Dallis grass, sticky heads |
bull crowngrass, bull paspalum |
|
Habit | Plants perennial; cespitose, rhizomatous, rhizomes short (less than 1 cm), forming a knotty base. | Plants annual. |
Culms | 50-175 cm, erect; nodes glabrous. |
15-96 cm, erect or prostrate, often rooting at the lower nodes; nodes glabrous. |
Sheaths | 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. |
glabrous; ligules 1-3.2 mm; blades to 56 cm long, 2.2-15 mm wide, flat. |
Panicles | 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. |
terminal, with 1-10(28) racemosely arranged branches; branches 1.2-8.2 cm, diverging; branch axes 0.7-2.3 mm wide, glabrous, broadly winged, wings about as wide as the central portion, margins scabrous, terminating in a spikelet. |
Spikelets | 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). |
2-2.2 mm long, 1.3-1.8 mm wide, paired, appressed to the branch axes, glabrous, broadly elliptic, obovate, or orbicular, light to dark brown. |
Lower glumes | absent; upper glumes and lower lemmas 5-7-veined, margins pilose; upper florets stramineous. |
absent; upper glumes glabrous, 5-veined, margins entire; lower lemmas glabrous, 3-5-veined, margins entire; upper florets dark glossy brown. |
Caryopses | 2-2.3 mm, white to brown. |
1.4-1.6 mm, white. |
2n | = 20, 40, 50-63. |
= 40. |
Paspalum dilatatum |
Paspalum boscianum |
|
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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AL; AR; FL; GA; KY; LA; MD; MS; NC; PA; SC; TN; TX; VA; PR |
Discussion | 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.) |
Paspalum boscianum grows in moist to dry, disturbed areas, and at the edges of forests. It is native from the southeastern United States through the West Indies and Mexico to Brazil. The California record came from a weed in a rice field. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 579. | FNA vol. 25, p. 579. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Name authority | Poir. | Flüggé |
Web links |
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