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.


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


Lower Taxa

Mary E. Barkworth +
(L.) Gould +
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. +
Panicum dichotomum var. ramulosum +  and Panicum microcarpon +
Dichanthelium dichotomum subsp. microcarpon +
Dichanthelium dichotomum +
subspecies +