Fimbristylis drummondii (Torrey & Hooker) Boeckeler; F. multistriata Boeckeler; F. puberula var. drummondii (Torrey & Hooker) D. B. Ward; F. spadicea (Linnaeus) Vahl var. puberula (Michaux) Chapman; Isolepis drummondii Torrey & Hooker

Plants with culm bases thickened, contiguous; rhizomes of attached culm bases, knotty, stout, covered with dark fibers and chaff from old leaf bases. Leaves: leaf sheaths distally with at least some hairs; blades with margins distantly to closely scabrid, surfaces glabrous or densely hirtellous. Fertile scales totally or distally puberulent.

Fruiting late spring–summer. Moist clays to sands or sandy peats, in prairies, savannas, glades, pinelands, acidic to basic sites; 0–1000 m; Ont.; Ala., Ark., Del., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mich., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., S.C., Tenn., Tex., Utah, Va.