Silene drummondii Hook.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Perennial, 2–5 dm, retrorse-puberulent, becoming glandular and often hirsute in the infl; lvs mostly basal, the lanceolate or elliptic to oblanceolate blade 3–10 cm × 5–12 mm, petiolate; cauline lvs remote, 2–4 pairs, much reduced, usually linear; fls white or pinkish, perfect, 1–several in a loose, narrow infl; cal narrowly tubular, 1–1.5 cm in fl, enlarged but not inflated in fr, 10- nerved, glandular; pet included in the cal or the blade shortly exserted, the claw flaring upwards and usually broader than the blade, often auriculate, the blade 1–3 mm, retuse or shallowly lobed, the appendages less than 0.5 mm; styles (4)5; fr unilocular, opening by (4)5 teeth; 2n=24, 48. Dry hillsides and plains; B.C. to Ariz., e. to Sask., N.D., S.D., Neb., and Clay Co., Minn. June–Aug. (Lychnis d.)