Fimbristylis puberula

(Michaux) Vahl

Enum. Pl. 2: 289. 1805.

Basionym: Scirpus puberulus Michaux Fl. Bor.-Amer. 1: 31. 1803
Treatment appears in FNA Volume 23. Mentioned on page 129.

Plants perennial, mostly loosely cespitose, to 100 cm, bases swollen; rhizomes short, knotty, or scaly, slender, contorted. Culms sometimes solitary, narrowly linear, distally angular, glabrous. Leaves ascending, from 1/3 as long to equally as long as culms, glabrous to pubescent; sheaths apically ciliate; ligule essentially absent or (in rhizomatous individuals) present, complete or incomplete; blades narrowly linear, 1–2 mm wide, mostly strongly involute, scabrid-ciliate. Inflorescences: anthelae simple or compound, compact or diffuse, mostly broad, ascending-branching; scapes slender, wandlike, 1 mm thick; lower leafy involucral bracts exceeded by or exceeding panicle. Spikelets variously red-brown, broadly ovoid to lance-cylindric, 5–10 mm; fertile scales broadly ovate, obtuse or obtuse-angled, 2.5–3.5 mm, abaxially glabrous or variously puberulent, midrib excurrent as mucro. Flowers: stamens 3; styles 2-fid, flat, fimbriate. Achenes yellowish to dark brown, lenticular-obovoid, 1 mm, with 11–20 vertical lines of horizontally rectangular or isodiametric, distinct or indistinct pits. 2n = 20.


V23 200-distribution-map.jpg

Ont., Ala., Ariz., Ark., Del., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mich., Miss., Mo., N.C., N.J., N.Mex., N.Y., Nebr., Ohio, Okla., S.C., Tenn., Tex., Utah, Va.


Varieties 2 (2 in the flora).

Selected References



1 Culm bases swollen, knotty, closely joined forming short thick, knotty rhizomes; leaves and sheaths totally pubescent or glabrous; ligule absent or incomplete; backs of involucral sheaths and fertile scales puberulent at least distally. Fimbristylis puberula var. puberula
1 Culm bases not swollen, producing several slender, scaly, orange rhizomes; leaves and sheaths mostly glabrous; ligule present, mostly complete; involucral sheaths and fertile scales usually smooth. Fimbristylis puberula var. interior
... more about "Fimbristylis puberula"
Robert Kral +
(Michaux) Vahl +
Scirpus puberulus +
Ont. +, Ala. +, Ariz. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mich. +, Miss. +, Mo. +, N.C. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Ohio +, Okla. +, S.C. +, Tenn. +, Tex. +, Utah +  and Va. +
Illustrated +  and Endemic +
Fimbristylis puberula +
Fimbristylis +
species +