Paspalum urvillei |
Paspalum setaceum |
|||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Vasey grass, Vasey's grass |
fringeleaf paspalum, sand paspalum, slender beadgrass, slender crown grass, thin paspalum |
|||||||||||||||||||||||||||||||||||||
Habit | Plants perennial; cespitose, with a knotty base composed of very short (less than 1 cm) rhizomes. | Plants perennial; cespitose or shortly rhizomatous. | ||||||||||||||||||||||||||||||||||||
Culms | 50-220 cm, erect; nodes glabrous or pubescent. |
25-110 cm, erect, spreading, or prostrate; nodes glabrous or pubescent. |
||||||||||||||||||||||||||||||||||||
Sheaths | 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. |
glabrous or pubescent; ligules 0.2-0.5 mm; blades flat, glabrous or pubescent. |
||||||||||||||||||||||||||||||||||||
Panicles | 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. |
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. |
||||||||||||||||||||||||||||||||||||
Spikelets | 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). |
1.4-2.6 mm long, paired, imbricate, appressed to the branch axes, elliptic to obovate to ovate to orbicular, stramineous or brown. |
||||||||||||||||||||||||||||||||||||
Caryopses | 1.2-1.7 mm, white. |
elliptic to suborbicular, white. |
||||||||||||||||||||||||||||||||||||
Lower | glumes absent; upper glumes and lower lemmas 3-veined, margins pilose; upper florets stramineous. |
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. |
||||||||||||||||||||||||||||||||||||
2n | = 40. |
= 20. |
||||||||||||||||||||||||||||||||||||
Paspalum urvillei |
Paspalum setaceum |
|||||||||||||||||||||||||||||||||||||
Distribution |
AL; AR; CA; FL; GA; KS; KY; LA; MO; MS; NC; OK; SC; TN; TX; VA; HI; PR
|
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
|
||||||||||||||||||||||||||||||||||||
Discussion | 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.) |
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.) |
||||||||||||||||||||||||||||||||||||
Key |
|
|||||||||||||||||||||||||||||||||||||
Source | FNA vol. 25. | FNA vol. 25. | ||||||||||||||||||||||||||||||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | ||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||
Name authority | Steud. | Michx. | ||||||||||||||||||||||||||||||||||||
Web links |
|