Paspalum malacophyllum |
Paspalum pubiflorum |
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rib paspalum |
hairyseed paspalum |
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Habit | Plants perennial; cespitose, sometimes with short rhizomes. | Plants perennial; usually decumbent, rooting at the nodes. |
Culms | 90-200 cm, erect; nodes sunken, glabrous or pubescent, brown. |
30-130 cm, decumbent; nodes glabrous or pubescent. |
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; ligules 1-3.2 mm; blades to 31 cm long, 4-18 mm wide, flat, glabrous, with a few hairs behind the ligules. |
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 2.2-7.9 cm, divergent to spreading, terminating in a spikelet; branch axes 1.1-2.3 mm wide, narrowly winged, glabrous, margins scabrous. |
Spikelets | 1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous. |
2.8-3.6 mm long, 1.5-2 mm wide, paired, imbricate, appressed to divergent from the branch axes, elliptic to obovate, pubescent or glabrous, light brown to stramineous. |
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 glabrous or sparsely pubescent, hairs shorter than 0.1 mm, 3-veined, margins entire; lower lemmas lacking ribs over the veins; upper florets stramineous. |
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Caryopses | 1.8-2 mm, golden brown or white. |
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Upper | florets white to stramineous. |
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2n | = 40, 60. |
= 60, ca. 64. |
Paspalum malacophyllum |
Paspalum pubiflorum |
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Distribution |
FL; GA; TX |
AL; AR; CO; DC; FL; GA; IL; IN; KS; KY; LA; MD; MO; MS; NC; OH; OK; PA; SC; TN; TX; VA; WV
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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 pubiflorum grows on the edges of forests and in disturbed areas. It is native to the southeastern United States, Mexico, and Cuba. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 584. | FNA vol. 25, p. 597. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Synonyms | P. pubiflorum var. glabrum, P. geminum | |
Name authority | Trin. | Rupr. ex E. Fourn. |
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