Cenchrus incertus M.A.Curtis
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Annual to short-lived perennial, slender, 3–10 dm; sheaths glabrous or sparsely villous at the summit; blades 2–18 cm × 2–6 mm; bur 5.5–10 × 2.5–5 mm (spines excluded), usually rather shortly hairy, cleft on 2 sides, with mostly 8–40 basally flattened, retrorsely barbed spines 2–5 mm; spikelets 3.5–6 mm, 2–4 per bur, exserted at the tip; 2n=34. Sandy soil; trop Amer., n. to se. Va., Ark., and Kans.