Silene armeria L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Glabrous or rarely sparsely puberulent annual 1–7 dm, the stem sometimes with slightly glutinous zones below some of the upper nodes; lvs sessile and ± clasping (basal more spatulate), 2–5 × 0.5–1.5 cm, rather numerous; infl open or compact, the ultimate cymes congested; cal tubular-clavate, much constricted below, umbilicate, 13–17 mm, 10-nerved; pet pink or lavender, auricles none, appendages linear, 2–3 mm, the blade 4–7 mm, obovate, truncate to emarginate; carpophore 7–8 mm; fr almost wholly 3-locular; seeds 0.6 mm wide, rugose; 2n=24. Native of Europe, formerly much cult., and found as a casual weed in our range. June, July.
sweet William catchfly