Paspalum malacophyllum |
Paspalum dilatatum |
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rib paspalum |
Dallis grass, sticky heads |
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Habit | Plants perennial; cespitose, sometimes with short rhizomes. | Plants perennial; cespitose, rhizomatous, rhizomes short (less than 1 cm), forming a knotty base. |
Culms | 90-200 cm, erect; nodes sunken, glabrous or pubescent, brown. |
50-175 cm, erect; nodes glabrous. |
Sheaths | pubescent; ligules 4-5 mm, membranous, brown, acute; blades 12-40 cm long, 8-35 mm wide, flat or conduplicate, pubescent below, glabrous above, distinctly pubescent basally. |
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 8-25 racemosely arranged branches; branches 1-8 cm, divergent to erect; branch axes 1-1.2 mm wide, margins scabrous, terminating in a spikelet; pedicels 0.2-0.4 and 0.5-1.2 mm long, flattened, scabrous. |
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 | 1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous. |
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). |
Glumes | absent; lower lemmas glabrous, ribbed over the veins, sulcate between, 5-veined, margins entire; upper lemmas as long as the lower ones, longitudinally papillose-striate, glabrous, pale-colored. |
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Lower glumes | absent; upper glumes and lower lemmas 5-7-veined, margins pilose; upper florets stramineous. |
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Caryopses | 2-2.3 mm, white to brown. |
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Upper | florets white to stramineous. |
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2n | = 40, 60. |
= 20, 40, 50-63. |
Paspalum malacophyllum |
Paspalum dilatatum |
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Distribution |
FL; GA; TX |
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 malacophyllum is native from Mexico to Bolivia and Argentina. It was introduced to the southern United States for forage and soil conservation, and is now established in the southeastern United States, growing in disturbed sites at scattered locations. (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. 584. | FNA vol. 25, p. 579. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Name authority | Trin. | Poir. |
Web links |
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