Arenaria lateriflora L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Colonial by rhizomes, the stem leafy, retrorsely puberulent; lvs 1–3 cm × 5–10 mm, usually ovate to elliptic-oblong and obtuse, sometimes narrower and acutish; cymes 1–5-fld, the peduncle 1–3 cm, the pedicels 5–15 mm, usually puberulent; sep 2–3 mm, ovate or obovate, obtuse or acutish, faintly 3–5-nerved, glabrous, scarious-margined; pet 4–6 mm; fr 3–5 mm, the 6 valves separating nearly to the base; seed 1–1.4 mm, smooth and glossy, with a small strophiole; 2n=48. Woods or sometimes open places; circumboreal, s. in Amer. to Pa., Mo., and s. Calif. May–July. Highly variable. (Moehringia l.)