Strictly floriferous, without bulblets in the infl; tep persistent, becoming callous-keeled and permanently investing the fr; alveoli of the seed-coat without pustules; otherwise much like no. 1 [Allium canadense L.]. Sandy soil on the plains; S.D. and w. Io. to Okla., Tex., and N.M. Our plants belong to the relatively northern var. perdulce, with fragrant fls and deep rose tep, fading purple.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.