Dichanthelium acuminatum subsp. acuminatum

Synonyms: Panicum ciliosum Panicum thurowii Panicum auburne Panicum acuminatum var. thurowii
Treatment appears in FNA Volume 25. Treatment on page 425.

Plants grayish olive green, densely velvety-villous throughout. Cauline nodes densely villous, with a glabrous ring below; fall phase branching extensively from the midculm nodes, forming conspicuous flabellate fascicles of branches. Cauline sheaths densely soft spreading-villous, often with inconspicuous smaller hairs underneath; midculm sheaths about 1/2 as long as the internodes; blades 6-12 cm long, to 10 mm wide, ascending to often spreading and slightly incurved, softly pubescent on both surfaces, with papillose-based cilia for most of their length. Primary panicles usually well-exserted, on peduncles longer than 8 cm. Spikelets 1.6-1.9 mm, broadly ellipsoid or obovoid.

Discussion

Dichanthelium acuminatum subsp. acuminatum grows primarily in moist, open, sandy areas on the Atlantic and Gulf coastal plains. Its range extends through Mexico, the West Indies, and Central America to northern South America.

Selected References

None.

Lower Taxa

None.

"usually distinctly longer and narrower" is not a number."decumbent" is not a number.

decumbent +, spreading +  and erect +
rounded +  and attenuate +
anatomy +  and kranz +
Mary E. Barkworth +
(Sw) Gould & C.A. Clark +
1 (?) +  and 3 (?) +
keeled +  and rounded +
well-differentiated +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
subcordate +  and rounded +
swelling +
disarticulating +  and pseudopetiolate +
grayish-green +  and olivaceous +
distinct +
6 cm60 mm <br />0.06 m <br /> (12 cm120 mm <br />0.12 m <br />) +
ovate +  and lanceolate +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
conspicuous +
flabellate +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not developed +
terete +  and compressed +
spreading-villous +
papillose-based +
sometimes longer +
decumbent +  and sprawling +
decumbent +, ascending +  and erect +
1 cm10 mm <br />0.01 m <br /> (15 cm150 mm <br />0.15 m <br />) +
Conn. +, N.J. +, N.Y. +, Wash. +, Va. +, Del. +, D.C. +, Wis. +, W.Va. +, Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Mass. +, Maine +, N.H. +, R.I. +, Vt. +, Fla. +, Wyo. +, N.Mex. +, Tex. +, La. +, Tenn. +, N.C. +, S.C. +, Pa. +, Calif. +, Puerto Rico +, Colo. +, Miss. +, Ala. +, Ark. +, Kans. +, Mo. +, N.Dak. +, Nebr. +, Okla. +, S.Dak. +, Mich. +, Minn. +, Ill. +, Ga. +, Ind. +, Iowa +, Ariz. +, Idaho +, Md. +, Ohio +, Utah +, Oreg. +, Mont. +, Pacific Islands (Hawaii) +, Nev. +  and Ky. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
3 cm30 mm <br />0.03 m <br /> (?) +
Oval (?) +  and Round (?) +
bracteate +  and ebracteate +
olive green or grayish-green +  and yellowish-green +
glabrous +  and pubescent +
cauline +  and basal +
coriaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
membranous +
inconspicuous +
1/4 +  and 1/2 +
obtuse +  and acute +
glabrous +  and ciliate +
whitish-scabridulous +
complex +  and simple +
concealed +  and prominent +
pubescent +  and glabrous +
swollen +
2 +  and 1 +
subterranean +
8 cm80 mm <br />0.08 m <br /> (?) +
dry +  and fleshy +
3 cm30 mm <br />0.03 m <br /> (12 cm120 mm <br />0.12 m <br />) +
pilose +, puberulent +  and glabrous +
pubescent +, densely +  and glabrous +
in triplets +  and paired +
yellowish-green +  and olivaceous or purplish +
1 +  and 60 +
unisexual +  and bisexual +
obovoid +  and ellipsoid +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
1 +  and 3 +
fused +  and free +
2 +  and 3 +
dome--shaped +  and triangular +
Panicum ciliosum +, Panicum thurowii +, Panicum auburne +  and Panicum acuminatum var. thurowii +
Dichanthelium acuminatum subsp. acuminatum +
Dichanthelium acuminatum +
subspecies +
membranous +
0.11 cm1.1 mm <br />0.0011 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
obtuse +  and acute or minutely umbonate or apiculate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
chartaceous-indurate +
decumbent +, spreading +  and erect +
involute +  and flat +
decumbent +, spreading +  and erect +
decumbent +, spreading +  and erect +
decumbent +, spreading +  and erect +
decumbent +, spreading +  and erect +
green +  and grayish olive +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +