Paspalum malacophyllum |
Paspalum langei |
|
---|---|---|
rib paspalum |
rustyseed paspalum |
|
Habit | Plants perennial; cespitose, sometimes with short rhizomes. | Plants perennial; cespitose. |
Culms | 90-200 cm, erect; nodes sunken, glabrous or pubescent, brown. |
23-125 cm, erect; nodes glabrous or 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. |
glabrous or pubescent; ligules 0.6-1.9 mm; blades to 38 cm long, 4-18 mm wide, flat, glabrous or pubescent, dark green. |
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 1-3(4) racemosely arranged branches; branches 2.3-13.4 cm, erect to divergent, terminating in a spikelet; branch axes 0.2-1 mm wide, glabrous, margins scabrous. |
Spikelets | 1.8-2 mm, paired, appressed to or divergent from the branch axes, oblong-elliptic, white to stramineous. |
2.1-3.3 mm long, 1.3-1.6 mm wide, paired, imbricate, appressed to the branch axes, elliptic to obovate, stramineous to brown. |
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 | 0.4-1.2(1.8) mm, stramineous to brown; upper glumes with papillose-based short pubescence, 3- or 5-veined, margins entire, lower lemmas with papillose-based short pubescence, lacking ribs over the veins, 3-veined, margins entire; upper florets light stramineous. |
|
Caryopses | 1.3-1.5 mm, light to dark brown. |
|
Upper | florets white to stramineous. |
|
2n | = 40, 60. |
= 40, 60. |
Paspalum malacophyllum |
Paspalum langei |
|
Distribution |
FL; GA; TX |
FL; LA; OK; TX |
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 langei is native from Texas to Florida, and extends through Mexico to Venezuela and the Antilles. It grows at the edges of moist woods and in disturbed areas. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 25, p. 584. | FNA vol. 25, p. 588. |
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum | Poaceae > subfam. Panicoideae > tribe Paniceae > Paspalum |
Sibling taxa | ||
Name authority | Trin. | (E. Fourn.) Nash |
Web links |