Nigella damascena L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Plant 3–6 dm; fls bluish, 3–4 cm wide, closely subtended by an involucre of dissected lvs; staminodes villous; 2n=12. Native of s. Europe, occasionally escaped from cult. in our range.