Dichanthelium tenue

(Muhl.) Freckmann & Lelong
Common names: Slender panicgrass
Synonyms: Panicum tenue Panicum albomarginatum Panicum acuminatum var. unciphyllum
Treatment appears in FNA Volume 25. Treatment on page 438.

Plants cespitose, with caudices, forming small, often rather dense clumps with few culms. Basal rosettes well-differentiated; blades 1-5 cm, ovate to lanceolate. Culms 15-55 cm tall, 0.2-0.8 mm thick, erect from geniculate bases; nodes glabrous; internodes mostly glabrous, or the lowest internodes sparsely appressed-pubescent basally; fall phase branching sparingly from the lower and midculm nodes. Cauline leaves 3-4; sheaths much shorter than the internodes, prominently veined, mostly glabrous, margins occasionally ciliate, ligules 0.2-0.7 mm, of hairs, without adjacent pseudoligules; blades 2-6 cm long, 1.5-6 mm wide, ascending, distant, flat, relatively thick, glabrous on both surfaces or the abaxial surfaces minutely puberulent, bases rounded, margins more or less prominently whitish-scabridulous, blades of the flag leaves much shorter than those of the lower leaves. Primary panicles 3-6 cm, nearly as wide as long, long-exserted, dense; branches wiry, spreading to ascending, usually scabridulous. Spikelets 1.3-1.7 mm long, less than 1 mm wide, ellipsoid, often purplish, densely puberulent, obtuse or subacute. Lower glumes usually less than 1/4 as long as the spikelets, broadly acute or obtuse; upper glumes and lower lemmas subequal, or the glumes slightly shorter, exceeded by the upper florets; lower florets sterile; upper florets 1.3-1.6 mm, ellipsoid, subacute. 2n = 18.

Discussion

Dichanthelium tenue grows in moist to dry, sandy woods, savannahs, and disturbed sites. It also grows in Chiapas, Mexico (Zuloaga et al. 1993). It exhibits features of D. sphaerocarpon and D. dichotomum. It is also closely related to D. ensifolium, and occasional specimens are intermediate between them.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number."elongated" is not a number.

... more about "Dichanthelium tenue"
anatomy +  and kranz +
Mary E. Barkworth +
(Muhl.) Freckmann & Lelong +
1 (?) +  and 3 (?) +
keeled +  and rounded +
well-differentiated +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
rounded +  and geniculate +
swelling +
disarticulating +  and pseudopetiolate +
non-radiate +  and radiate +
distinct +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate +  and lanceolate +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
thick;1.5mm;6mm +
spreading;ascending +
scabridulous +
spikelike +
not developed +
terete +  and compressed +
usually distinctly longer and narrower +
sometimes longer +
Slender panicgrass +
decumbent +  and sprawling +
15 cm150 mm <br />0.15 m <br /> (55 cm550 mm <br />0.55 m <br />) +
pubescent +  and glabrous +
geniculate +
5 cm50 mm <br />0.05 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
Minn. +, Conn. +, N.J. +, N.Y. +, Wash. +, Ala. +, Mich. +, N.C. +, Pa. +, Puerto Rico +, S.C. +, W.Va. +, Ark. +, Iowa +, Kans. +, Mo. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Del. +, D.C +, Wis. +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Pacific Islands (Hawaii) +, Md. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Wyo. +, Miss. +, Ariz. +, N.Mex. +, Tex. +, La. +, Ga. +, Tenn. +, Calif. +, Nev. +, Colo. +, Ill. +, Ind. +, Va. +, Idaho +, Ohio +, Utah +, Mont. +, Oreg. +  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 +
cauline +  and basal +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
membranous +
inconspicuous +
obtuse +  and acute +
appressed-pubescent +
whitish-scabridulous +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
dry +  and fleshy +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
in triplets +  and paired +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
1 +  and 60 +
unisexual +  and bisexual +
subacute +, obtuse +  and ellipsoid +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
0mm +  and 1mm +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Panicum tenue +, Panicum albomarginatum +  and Panicum acuminatum var. unciphyllum +
Dichanthelium tenue +
Dichanthelium sect. Ensifolia +
species +
membranous +
subacute +  and ellipsoid +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.16 cm1.6 mm <br />0.0016 m <br />) +
chartaceous-indurate +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +