Paspalum acuminatum

Raddi
Common names: Brook paspalum Canoegrass
Treatment appears in FNA Volume 25. Treatment on page 572.

Plants perennial; rhizomatous. Culms 30-100 cm, strongly decumbent, upright portion usually not standing more than 20 cm tall, much branched; nodes glabrous. Sheaths glabrous; ligules 1-2.4 mm; blades to 7 cm long, 3-6.5 mm wide, flat. Panicles terminal, with 2-5 racemosely arranged branches; branches 2-6 cm, diverging, persistent; branch axes 2-3.3 mm wide, broadly winged, glabrous, margins scabrous, terminating in a spikelet. Spikelets 3.2-4 mm long, 1.6-1.7 mm wide, solitary, appressed to the branch axes, elliptic, abruptly pointed, stramineous. Lower glumes absent; upper glumes and lower lemmas glabrous, 5-veined; upper florets stramineous, lemmas with a few minute hairs at the apices. Caryopses 2-3 mm, white. 2n = 40.

Distribution

Ga., Tex., La., Ala., Miss., Fla.

Discussion

Paspalum acuminatum grows at the edges of lakes, ponds, rice fields, and wet roadside ditches. It is native to the Americas, with a range that extends from the southern United States to Argentina.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Paspalum acuminatum"
rounded +
anatomy +  and kranz +
Charles M. Allen +  and David W. Hall +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
0 cm0 mm <br />0 m <br /> (7 cm70 mm <br />0.07 m <br />) +
usually linear +  and lanceolate occasionally ovate +
0.3 cm3 mm <br />0.003 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
2mm +  and 3.3mm +
persistent +
spikelike +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
not developed +
ringlike +
orbicular +  and elliptical planoconvex or flattened +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
sometimes longer +
Brook paspalum +  and Canoegrass +
branched +  and solid +
trailing +, prostrate +, spreading +  and erect +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Ga. +, Tex. +, La. +, Ala. +, Miss. +  and Fla. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
minute +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
membranous +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
spreading +  and erect +
dry +  and fleshy +
subsessile +  and shortly pedicellate +
paired +  and not solitary +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1 +  and 60 +
unisexual +  and bisexual +
1.6mm +  and 1.7mm +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Gramineae +
Paspalum acuminatum +
Paspalum +
species +
membranous +
stipitate +  and sessile +
rounded +  and acute +
stramineous +  and dark-brown +
smooth +  and slightly rugose +
smooth +  and slightly rugose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +