Monographs Details: Helleborus
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Sep 5, large, petaloid; pet none; stamens numerous, the outer 8–10 modified into staminodes, short, upcurved, basally clawed, distally clavate or obovoid, hollow and somewhat 2-lipped; pistils mostly 3 or 4, with erect, slender style; fr follicular; poisonous perennial herbs with alternate, palmately cleft (or the upper entire) lvs and large white, green, or purple fls terminating the stem and branches. 20, Eurasia.