Plants to 2 m; stem and infl ±densely villous, never strigose; seeds 3-6; self-compatible, often self- pollinated, complex heterozygote with about half the pollen stainable; mainly e. of the Mississippi R., extending also into Io.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.