Monographs Details: Opuntia polyacantha Haw.
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Scientific Name:Opuntia polyacantha Haw.
Description:Species Description - A similar western sp. with 6–10 spines per areole and dry frs, has been reported e. to Wis. and Mo.