Veratrum viride Aiton
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stem stout, erect, leafy to the top, to 2 m; lvs sessile or nearly so, often somewhat clasping, plicate, oval or elliptic, to 3 dm, half as wide; panicle freely branched, 2–5 dm, hairy; pedicels 2–4 mm; tep yellowish-green, elliptic or broadly lanceolate, 8–13 mm, narrowed to the base, ciliate; filaments erect, shorter than and free from the perianth; fr ovoid, 18–25 mm; 2n=32. Swamps and wet woods; Que. to Ont., s. to N.C.; Alas. to Oreg. June, July.