Dichanthelium boscii

(Poir.) Gould & C.A. Clark
Common names: Bosc's panicgrass Panic de bosc
Synonyms: Panicum boscii var. molle Panicum boscii
Treatment appears in FNA Volume 25. Treatment on page 412.

Plants forming small clumps, with knotty rhizomes less than 2 mm thick. Basal rosettes well-differentiated; sheaths pubescent; blades ovate to lanceolate, dark green. Culms 25-75 cm, initially erect, often sprawling in the fall, nodes densely retrorsely bearded; internodes glabrous, or pilose with papillose-based hairs; fall phase branching from the midculm nodes, branches nearly erect, sparsely rebranching, blades and secondary panicles only slightly reduced. Cauline leaves 4-6, often with a transitional leaf above the basal rosette; sheaths not overlapping, bases puberulent to retrorsely pilose, margins ciliate, collars pubescent; ligules 0.4-0.9 mm, membranous, ciliate, cilia longer than the membranous portion; blades 3-6 times longer than wide, 15-40 mm wide, ovate-lanceolate, glabrous, puberulent, or pilose, with 11-15 major veins and 40-120 minor veins, bases cordate, margins with papillose-based cilia. Panicles 4-12 cm long, 4-12 cm wide, about as long as wide when fully expanded, partially included to tardily exserted, with 16-60 spikelets. Spikelets 3.8-5.2 mm long, 1.7-2.2 mm wide, narrowly ellipsoid, pubescent or puberulent. Lower glumes 1/3 – 1/2 as long as the spikelets, narrowly triangular; upper glumes shorter than the spikelets; lower florets usually staminate; upper florets pointed, with a minute tuft of hairs. 2n = 18,36.


Conn., N.J., N.Y., Del., W.Va., Fla., Tex., La., Tenn., N.C., S.C., Pa., Va., D.C., Ala., Ark., Ill., Ga., Ind., Md., Kans., Okla., Ohio, Mo., Miss., Ky., Mass., R.I.


Dichanthelium boscii usually grows in semi-open areas in dry oak-hickory woods of the eastern United States. The primary panicles are open-pollinated and are produced from late April through June (and some¬times again in the fall); the secondary panicles are partly open-pollinated, and are produced from July through September.

Selected References


Lower Taxa

... more about "Dichanthelium boscii"
Mary E. Barkworth +
(Poir.) Gould & C.A. Clark +
Bosc's panicgrass +  and Panic de bosc +
Conn. +, N.J. +, N.Y. +, Del. +, W.Va. +, Fla. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Va. +, D.C. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Md. +, Kans. +, Okla. +, Ohio +, Mo. +, Miss. +, Ky. +, Mass. +  and R.I. +
Panicum boscii var. molle +  and Panicum boscii +
Dichanthelium boscii +
Dichanthelium sect. Macrocarpa +
species +