Dichanthelium dichotomum subsp. nitidum

(Lam.) Freckmann & Lelong
Treatment appears in FNA Volume 25. Treatment on page 433.

Plants very similar in most respects to subsp. microcarpon. Fall phase freely branching from all nodes, reclining from masses of branchlets and numerous reduced, ciliate blades and secondary panicles. Cauline sheaths and blades usually glabrous, lower sheaths and blades sometimes sparsely pubescent. Spikelets 1.8-2.5 mm (rarely longer), puberulent or pubescent. Lower glumes less than 1/3 as long as the spikelets, subacute; upper glumes and lower lemmas subequal; upper florets 1.7-2 mm long, 0.7-1.0 mm wide, subobtuse. 2n = unknown.

Discussion

Dichanthelium dichotomum subsp. nitidum grows in moist to wet areas, and the borders of swamps. It is primarily a coastal plain taxon, ranging from Virginia to southeastern Texas and Florida.

Dichanthelium dichotomum subsp. nitidum is very similar to both subsp. microcarpon and subsp. mattamuskeetense, and intergrades with each occasionally.

Selected References

None.

Lower Taxa

None.

No values specified."usually distinctly longer and narrower" is not a number."decumbent" is not a number.

rounded +  and attenuate +
anatomy +  and kranz +
Mary E. Barkworth +
(Lam.) Freckmann & Lelong +
1 (?) +  and 3 (?) +
keeled +  and rounded +
well-differentiated +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
constricted +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
yellow-green +  and purplish +
distinct +
3.5 cm35 mm <br />0.035 m <br /> (14 cm140 mm <br />0.14 m <br />) +
subcordate +, ovate +  and lanceolate +
reduced +
ascending;spreading +
scabridulous +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
fascicles +  and divergent +
not developed +
terete +  and compressed +
sometimes longer +
Large (?) +  and Small (?) +
branching +  and hollow +
decumbent +  and sprawling +
decumbent +  and erect +
geniculate +
20 cm200 mm <br />0.2 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Conn. +, N.J. +, N.Y. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, N.B. +, Ont. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Puerto Rico +, Ark. +, Iowa +, Md. +, Ala. +, Ill. +, Ga. +, Ind. +, Okla. +, Ohio +, Mo. +, Minn. +, Mich. +, Miss. +  and Ky. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Oval (?) +  and Round (?) +
bracteate +  and ebracteate +
solid +  and hollow +
olive green +  and purplish +
fascicles +  and divergent +
fascicles +  and divergent +
cauline +  and basal +
coriaceous +
1 cm10 mm <br />0.01 m <br /> (?) +
membranous +
inconspicuous +
pubescent +  and glabrous +
glabrous +  and ciliate +
complex +  and simple +
rebranched +  and branched +
concealed +  and prominent +
bearded +, pilose +  and glabrous +
2 +  and 1 +
subterranean +
dry +  and fleshy +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
in triplets +  and paired +
purplish +  and green +
pubescent +  and puberulent +
many +  and few +
unisexual +  and bisexual +
obtuse +  and acute +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Panicum niditum +, Panicum dichotomum var. barbulatum +  and Panicum dichotomum +
Dichanthelium dichotomum subsp. nitidum +
Dichanthelium dichotomum +
subspecies +
membranous +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
usually slightly shorter +
chartaceous-indurate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +