Paspalum laeve |
Paspalum setaceum |
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field beadgrass, field paspalum |
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
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Habit | Plants perennial; shortly rhizomatous. | Plants perennial; cespitose or shortly rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 40-120 cm, erect; nodes glabrous or pubescent. |
25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
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Sheaths | glabrous or pubescent; ligules 1.5-3.8 mm; blades to 37 cm long, 2-9.3 mm wide, flat, glabrous or pubescent. |
glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
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Panicles | terminal, with 1-6 racemosely arranged branches; branches 2-10.9 cm, diverging to spreading (rarely erect), persistent; branch axes 0.6-1.3 mm wide, glabrous, margins scabrous, terminating in a spikelet. |
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 | 2.3-3.3 mm long, 2-2.7 mm wide, solitary, appressed to the branch axes, elliptic to obovate or nearly orbicular, glabrous, 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 3-veined, lower lemmas 5-veined; upper florets pale to 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 | about 2 mm, white to yellow-brown. |
elliptic to suborbicular, white. |
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2n | = 20, 58, 70, 80. |
= 20. |
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Paspalum laeve |
Paspalum setaceum |
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Distribution |
AL; AR; CT; DC; DE; FL; GA; IL; IN; KS; KY; LA; MA; MD; MI; MO; MS; NC; NJ; NY; 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 laeve is restricted to the eastern United States. It grows at the edges of forests and in disturbed areas. (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. 572. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
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Synonyms | P. longipilum, P. laeve var. pilosum, P. laeve var. circulare, P. laeve var. australe, P. circulare | |||||||||||||||||||||||||||||||||||||
Name authority | Michx. | Michx. | ||||||||||||||||||||||||||||||||||||
Web links |
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