Paspalum pubiflorum |
Paspalum setaceum |
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hairyseed paspalum |
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
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Habit | Plants perennial; usually decumbent, rooting at the nodes. | Plants perennial; cespitose or shortly rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 30-130 cm, decumbent; nodes glabrous or pubescent. |
25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
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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 0.2-0.5 mm; blades flat, glabrous or pubescent. |
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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 and axillary, with 1-6 racemosely axillary arranged branches, panicles partially or completely enclosed by the subtending leaf sheath; branches 2-12(17) cm, ascending to spreading, often arcuate, terminating in a spikelet; branch axes 0.2-1.2 mm wide, glabrous, sometimes scabrous. |
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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. |
1.4-2.6 mm long, paired, imbricate, appressed to the branch axes, elliptic to obovate to ovate to orbicular, stramineous or brown. |
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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. |
absent; upper glumes and lower lemmas glabrous or shortly glandular-pubescent, 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. |
elliptic to suborbicular, white. |
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2n | = 60, ca. 64. |
= 20. |
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Paspalum pubiflorum |
Paspalum setaceum |
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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; AZ; CO; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NM; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WI; WV; PR; ON
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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 setaceum is a variable species that grows east of the Rocky Mountains in the contiguous United States and Mexico. The following treatment summarizes the major patterns of variation within the species. Some specimens will be hard to place, particularly old herbarium specimens that have lost their color. Nine varieties grow in the Flora region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 597. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
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Synonyms | P. pubiflorum var. glabrum, P. geminum | |||||||||||||||||||||||||||||||||||||
Name authority | Rupr. ex E. Fourn. | Michx. | ||||||||||||||||||||||||||||||||||||
Web links |
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