Monographs Details: Aristida longespica var. geniculata (Raf.) Fernald
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Variety Description - Central awn (8–)12–27 mm, the lateral ones (1–)6–18 mm; spikelets avg a little larger. More common westward, seldom e. to Ind. and s. Ont. (A. intermedia; A. necopina)