Amsonia ciliata Walter
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Rampant in the group. Hybrids and hybrid segregates derived from A. androsaemifolium × either A. cannabinum or A. sibiricum are called A. ×floribundum Greene (A. medium).