Dichanthelium dichotomum subsp. microcarpon

Synonyms: Panicum dichotomum var. ramulosum Panicum microcarpon Muhl. ex Elliott
Treatment appears in FNA Volume 25. Treatment on page 433.

Culms 30-100 cm, slender, erect or geniculate; fall phase freely branching from all nodes, reclining from masses of branchlets and numerous reduced, ciliate blades and secondary panicles; nodes conspicuously bearded with retrorse hairs. Sheaths usually glabrous, lowermost sheaths sometimes sparsely pubescent, occasionally with whitish spots between the veins, ciliate along the margins; blades 5-14 cm long, 5-14 mm wide, thin, spreading to reflexed, glabrous on both surfaces, bases with few-to-many papillose-based cilia. Panicles 5-12 cm, well-exserted, dense. Spikelets 1.5-1.8 mm, usually glabrous, rarely slightly pubescent. Lower glumes usually less than 14 as long as the spikelets; upper glumes usually shorter than the lower lemmas; upper florets 1.3-1.6 mm long, 0.6-0.8 mm wide, subacute. 2n = 18.

Discussion

Dichanthelium dichotomum subsp. microcarpon grows in wet woods, swamps, and wetland borders. It is a widespread subspecies, extending from southern Michigan to Massachusetts and south to eastern Oklahoma and Texas and throughout the southeast to central Florida.

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 +
(L.) Gould +
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 +
5 cm50 mm <br />0.05 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 +
papillose-based +
sometimes longer +
Large (?) +  and Small (?) +
decumbent +  and sprawling +
geniculate +
slender +
30 cm300 mm <br />0.3 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 +
obtuse +  and acute +
pubescent +  and glabrous +
glabrous +  and ciliate +
complex +  and simple +
rebranched +  and branched +
concealed +  and prominent +
2 +  and 1 +
subterranean +
well-exserted +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
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 glabrous +
many +  and few +
unisexual +  and bisexual +
obtuse +  and acute +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Panicum dichotomum var. ramulosum +  and Panicum microcarpon +
Dichanthelium dichotomum subsp. microcarpon +
Dichanthelium dichotomum +
subspecies +
membranous +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
chartaceous-indurate +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +