Paspalum bifidum |
Paspalum setaceum |
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pitchfork crowngrass, pitchfork paspalum |
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
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Habit | Plants perennial; rhizomatous. | Plants perennial; cespitose or shortly rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 60-140 cm, erect; nodes glabrous. |
25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
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Sheaths | pubescent; ligules 2-4 mm; blades to 37 cm long, 2.2-11 mm wide, flat. |
glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
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Panicles | terminal, with 2-5 racemosely arranged branches; branches 3.7-13 cm, divergent to erect; branch axes 0.2-0.8 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 | 3.1-4 mm long, 2-2.5 mm wide, paired, not imbricate, appressed to the branch axes, elliptic to obovate, yellow-brown. |
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 | present or absent; upper glumes glabrous or sparsely pubescent basally, (6)7-veined, margins entire; lower lemmas glabrous or sparsely pubescent basally, lacking ribs over the veins, 5-veined, margins entire; upper florets white. |
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 | 2.6-2.9 mm, purple. |
elliptic to suborbicular, white. |
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2n | = unknown. |
= 20. |
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Paspalum bifidum |
Paspalum setaceum |
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Distribution |
AL; AR; FL; GA; LA; MO; MS; NC; OK; SC; TN; TX; VA
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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 bifidum is restricted to the southeastern United States. It grows at the edges of forests in longleaf pine-oak-grass ecosystems, usually in dry to mesic loamy sandy soils. It grows vigorously following fire. (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. 586. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
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Name authority | (Bertol.) Nash | Michx. | ||||||||||||||||||||||||||||||||||||
Web links |
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