Paspalum conjugatum
Paspalum modestum
herbe creole, Hilo grass, muhsrasre, rehn wei, sour grass, sour paspalum, ti grass
water paspalum
15-80 cm, erect;
nodes glabrous.
30-110 cm, decumbent and rooting at the lower nodes;
nodes glabrous.
glabrous, pubescent distally;
ligules 0.5-0.8 mm;
blades 7-23 cm long, 1.5-8 mm wide, flat.
glabrous;
ligules 1-2.3 mm;
blades to 50 cm long, 2-10 mm wide, flat, glabrous or pubescent.
terminal, usually composed of a pair of branches, a third branch sometimes present below the terminal pair;
branches 2.5-12.7 cm, diverging to spreading, often arcuate, persistent;
branch axes 0.2-0.8 mm wide, glabrous, margins scabrous, terminating in a reduced spikelet.
terminal, with 2-6(10) racemosely arranged branches;
branches 3.5-12.5 cm, diverging to erect;
branch axes 1-2.1 mm wide, glabrous, terminating in a spikelet.
1.3-1.9 mm long, 0.8-1.1 mm wide, solitary, appressed to the branch axes, ovate, stramineous.
2.5-3 mm long, 1.3-1.6 mm wide, paired, appressed to the branch axes, elliptic, light brown.
absent;
upper glumes pilose on the margins, veinless or 2-3-veined;
lower lemmas glabrous, veinless or 2-3-veined;
upper florets whitish to golden yellow.
often present, 0.5-2 mm, brown;
upper glumes glabrous, 5-veined, margins entire, lower lemmas glabrous, 5-7-veined, margins entire;
upper florets olive, golden brown, or dark brown.
0.9-1.1 mm, white to yellow.
1.6-1.8 mm, brown.
= 18, 20, 40, 80.
= 20, 30, 40.
Paspalum conjugatum
Paspalum modestum
Paspalum conjugatum is native to tropical and subtropical regions of both the Western and Eastern hemispheres, including the Flora region. It grows in disturbed areas and at the edges of forests, and is sometimes used as a lawn grass.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Paspalum modestum grows in wet roadside ditches and rice fields of Texas and southern Louisiana. It was introduced to the United States from South America. Plants with pale florets may key to P. lividum, which differs from P. modestum in having shorter ligules.
Until recently, plants belonging to Paspalum modestum have been called P. hydrophilum Henrard in North America, but experimental studies have shown that the two species are quite distinct and that North American plants belong to P. modestum.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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