Paspalum malacophyllum |
Paspalum paniculatum |
|
---|---|---|
rib paspalum |
arrocillo |
|
Habit | Plants perennial; cespitose, sometimes with short rhizomes. | Plants perennial; cespitose or rhizomatous. |
Culms | 90-200 cm, erect; nodes sunken, glabrous or pubescent, brown. |
to 100 cm, erect; nodes pubescent. |
Sheaths | pubescent; ligules 4-5 mm, membranous, brown, acute; blades 12-40 cm long, 8-35 mm wide, flat or conduplicate, pubescent below, glabrous above, distinctly pubescent basally. |
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, with 8-25 racemosely arranged branches; branches 1-8 cm, divergent to erect; branch axes 1-1.2 mm wide, margins scabrous, terminating in a spikelet; pedicels 0.2-0.4 and 0.5-1.2 mm long, flattened, 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 | 1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous. |
1.1-1.3 mm long, 0.9-1 mm wide, paired, diverging from the branch axes, ovate, light brown to stramineous. |
Glumes | absent; lower lemmas glabrous, ribbed over the veins, sulcate between, 5-veined, margins entire; upper lemmas as long as the lower ones, longitudinally papillose-striate, glabrous, pale-colored. |
|
Lower glumes | absent; upper glumes and lower lemmas pubescent, 3-veined; upper florets 1.1-1.3 mm, stramineous. |
|
Caryopses | 0.7-0.8 mm, light brown. |
|
Upper | florets white to stramineous. |
|
2n | = 40, 60. |
= 20, 40, 60. |
Paspalum malacophyllum |
Paspalum paniculatum |
|
Distribution |
FL; GA; TX |
MS; HI; PR; Virgin Islands |
Discussion | Paspalum malacophyllum is native from Mexico to Bolivia and Argentina. It was introduced to the southern United States for forage and soil conservation, and is now established in the southeastern United States, growing in disturbed sites at scattered locations. (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.) |
Source | FNA vol. 25, p. 584. | FNA vol. 25, p. 577. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Name authority | Trin. | L. |
Web links |