Dichanthelium dichotomum subsp. lucidum

(Ashe) Freckmann & Lelong
Synonyms: Panicum sphagnicola Panicum lucidum Panicum dichotomum var. ludicum
Treatment appears in FNA Volume 25. Treatment on page 433.

Culms occasionally more than 60 cm, very slender, weak; nodes usually glabrous; internodes often flattened, green, glabrous; fall phase with reclining or decumbent culms and numerous axillary branches, branches elongated and widely divergent, not forming fascicles. Cauline sheaths usually shorter than the internodes, glabrous; blades slightly smaller than those of the other subspecies, ascending or spreading, often lustrous, bright green, glabrous throughout. Primary panicles slightly smaller and with fewer spikelets than in the other subspecies (particularly subsp. dichotomum, which it closely resembles). Spikelets 1.8-2.3 mm, ellipsoid, usually glabrous, obtuse to subacute; upper florets 1.7-2 mm. 2n = unknown.

Discussion

Dichanthelium dichotomum subsp. lucidum grows in wet woods, the margins of cypress swamps, sphagnum bogs, and other similar, wet habitats. It is primarily a species of the coastal plain, ranging from New Jersey to Florida, southeastern Texas, and up the Mississippi embayment to western Tennessee and, as a disjunct, on the Indiana Dunes of Lake Michigan.

Selected References

None.

Lower Taxa

None.

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

rounded +  and attenuate +
anatomy +  and kranz +
Mary E. Barkworth +
(Ashe) 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 +
bright green +
distinct +
3.5 cm35 mm <br />0.035 m <br /> (14 cm140 mm <br />0.14 m <br />) +
subcordate +, ovate +  and lanceolate +
not fascicles +  and divergent +
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 reclining +
geniculate +
slender +
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 +
fascicles +  and divergent +
fascicles +  and divergent +
cauline +  and basal +
coriaceous +
1 cm10 mm <br />0.01 m <br /> (?) +
membranous +
inconspicuous +
obtuse +  and acute +
pubescent +  and glabrous +
glabrous +  and ciliate +
complex +  and simple +
rebranched +  and branched +
concealed +  and prominent +
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 +
unisexual +  and bisexual +
obtuse +  and subacute +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Panicum sphagnicola +, Panicum lucidum +  and Panicum dichotomum var. ludicum +
Dichanthelium dichotomum subsp. lucidum +
Dichanthelium dichotomum +
subspecies +
membranous +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
subacute +  and obtuse +
0.17 cm1.7 mm <br />0.0017 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
usually slightly shorter +
chartaceous-indurate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +