Paspalum setaceum var. longepedunculatum

(Leconte) Alph. Wood
Common names: Barestem paspalum
Endemic
Synonyms: Paspalum longepedunculatum
Treatment appears in FNA Volume 25. Treatment on page 590.

Plants erect. Leaves mostly basal; blades to 15 cm long, 3-10 mm wide, glabrous, usually recurved, yellow-green, margins ciliate. Panicle branches 2.4-9.2 cm long, ascending or nodding, arcuate; branch axes 0.2-0.6 mm wide. Spikelets 1.4-1.8 mm long, 0.9-1.3 mm wide, elliptic to obovate or suborbicular, glabrous or with scattered glandular-hairs, not spotted; lower lemmas without an evident midvein; upper florets 1.4-1.8 mm.

Discussion

Paspalum setaceum var. longepedunculatum grows on open ground, usually in moist areas such as along ditches and roadsides, as well as in flatwoods. It is found primarily in the coastal plain of the southeastern United States, but has also been found in Ohio, Kentucky, and Tennessee. It is similar to var. villosissimum, differing in its glabrous leaves, more delicate habit, and more poorly-developed rhizomes. Both varieties grow in peninsular Florida, but var. longepedunculatum also grows along the coast as far west as the Mississippi delta and as far north as southern North Carolina.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

anatomy +  and kranz +
Charles M. Allen +  and David W. Hall +
(Leconte) Alph. Wood +
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 +
yellow-green +
0 cm0 mm <br />0 m <br /> (15 cm150 mm <br />0.15 m <br />) +
usually linear +  and lanceolate occasionally ovate +
3mm;10mm +
17 cm170 mm <br />0.17 m <br /> (?) +
0.2mm +  and 0.6mm +
ascending;spreading +
spikelike +
not developed +
ringlike +
elliptic +  and suborbicular +
sometimes longer +
Barestem paspalum +
branched +  and solid +
prostrate +, spreading +  and erect +
25 cm250 mm <br />0.25 m <br /> (110 cm1,100 mm <br />1.1 m <br />) +
Conn. +, N.J. +, N.Y. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, Ont. +, Fla. +, N.H. +, N.Mex. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Mass. +, R.I. +, Vt. +, Puerto Rico +, Colo. +, Md. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Kans. +, Nebr. +, Okla. +, Ohio +, Mo. +, Minn. +, Mich. +, Mont. +, Miss. +, Ky. +  and S.Dak. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
membranous +
inconspicuous +
complex +  and simple +
concealed +  and prominent +
pubescent +  and glabrous +
2 +  and 1 +
2.4 cm24 mm <br />0.024 m <br /> (9.2 cm92 mm <br />0.092 m <br />) +
nodding +  and ascending +
subterranean +
spreading +  and erect +
dry +  and fleshy +
pubescent +  and glabrous +
subsessile +  and shortly pedicellate +
imbricate +  and paired +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
with scattered glandular-hairs +  and glabrous +
1 +  and 60 +
unisexual +  and bisexual +
elliptic +  and obovate or suborbicular +
0.9mm +  and 1.3mm +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Paspalum longepedunculatum +
Paspalum setaceum var. longepedunculatum +
Paspalum setaceum +
variety +
membranous +
stipitate +  and sessile +
rounded +  and acute +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
glandular-pubescent +  and glabrous +
stramineous +  and dark-brown +
smooth +  and slightly rugose +
glandular-pubescent +  and glabrous +
smooth +  and slightly rugose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +