Paspalum pubiflorum |
Paspalum urvillei |
|
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hairyseed paspalum |
Vasey grass, Vasey's grass |
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Habit | Plants perennial; usually decumbent, rooting at the nodes. | Plants perennial; cespitose, with a knotty base composed of very short (less than 1 cm) rhizomes. |
Culms | 30-130 cm, decumbent; nodes glabrous or pubescent. |
50-220 cm, erect; nodes glabrous or pubescent. |
Sheaths | 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. |
glabrous or pubescent; ligules 1-4(7.7) mm; blades 12-60 cm long, 2-12 mm wide, flat, mostly glabrous, a few long hairs near the base of the adaxial surface. |
Panicles | 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. |
terminal, with (4)10-30 racemosely arranged branches; branches 1.2-11.5 cm, divergent; branch axes 0.5-1.1 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet. |
Spikelets | 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. |
1.8-2.8 mm long, 1.1-1.5 mm wide, paired, appressed to the branch axes, elliptic to slightly obovate, stramineous (rarely purple). |
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. |
absent; upper glumes and lower lemmas 3-veined, margins pilose; upper florets stramineous. |
Caryopses | 1.8-2 mm, golden brown or white. |
1.2-1.7 mm, white. |
2n | = 60, ca. 64. |
= 40. |
Paspalum pubiflorum |
Paspalum urvillei |
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Distribution |
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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AL; AR; CA; FL; GA; KS; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA; HI; PR
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Discussion | 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.) |
Paspalum urvillei has been introduced to the United States from South America. In the Flora region it grows in disturbed, moist to wet areas, primarily in the southeastern United States. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 597. | FNA vol. 25. |
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 | Rupr. ex E. Fourn. | Steud. |
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