Paspalum setaceum |
Paspalum paniculatum |
|||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
arrocillo |
|||||||||||||||||||||||||||||||||||||
Habit | Plants perennial; cespitose or shortly rhizomatous. | Plants perennial; cespitose or rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
to 100 cm, erect; nodes pubescent. |
||||||||||||||||||||||||||||||||||||
Sheaths | glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
pubescent; ligules 0.2-0.5 mm; blades 12-35 cm long, 10-24 mm wide, flat, scabrous, pubescent near the margins, margins usually undulate. |
||||||||||||||||||||||||||||||||||||
Panicles | 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. |
terminal, with 18-50 racemosely arranged branches; branches 0.8-8.9 cm, spreading to diverging, often arcuate; branch axes 0.2-0.5 mm wide, narrowly winged, scabrous, terminating in a spikelet. |
||||||||||||||||||||||||||||||||||||
Spikelets | 1.4-2.6 mm long, paired, imbricate, appressed to the branch axes, elliptic to obovate to ovate to orbicular, stramineous or brown. |
1.1-1.3 mm long, 0.9-1 mm wide, paired, diverging from the branch axes, ovate, light brown to stramineous. |
||||||||||||||||||||||||||||||||||||
Lower glumes | 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. |
absent; upper glumes and lower lemmas pubescent, 3-veined; upper florets 1.1-1.3 mm, stramineous. |
||||||||||||||||||||||||||||||||||||
Caryopses | elliptic to suborbicular, white. |
0.7-0.8 mm, light brown. |
||||||||||||||||||||||||||||||||||||
2n | = 20. |
= 20, 40, 60. |
||||||||||||||||||||||||||||||||||||
Paspalum setaceum |
Paspalum paniculatum |
|||||||||||||||||||||||||||||||||||||
Distribution |
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
|
MS; HI; PR; Virgin Islands |
||||||||||||||||||||||||||||||||||||
Discussion | 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.) |
Paspalum paniculatum is native from Mexico and the West Indies to Argentina. It is now established in Mississippi and southern Florida, growing in disturbed areas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||||||||||||||||||||||||||
Key |
|
|||||||||||||||||||||||||||||||||||||
Source | FNA vol. 25. | FNA vol. 25, p. 577. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Name authority | Michx. | L. | ||||||||||||||||||||||||||||||||||||
Web links |
|