Monographs Details: Euthamia x hirtipes (Fernald) Sieren
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Species Description - From se. Va., has the aspect of a hybrid between S. tenuifolia var. tenuifolia and the nuttallii phase of E. graminifolia, and was tentatively so considered by Fernald. Some ± similar plants from N.C. are reported to have 2n=54 chromosomes. Further study is in order.