Galium glaucum L.

Perennial 3–8 dm; stem roundly 4-angled; lvs mostly in whorls of 8–10, linear, 1-nerved, 2–4 cm × 0.5–2 mm, minutely roughened on the margins, revolute to the midrib; peduncles terminal and from the upper axils, trichotomously branched, each forming an umbelliform cluster and together a cymose panicle; cor white, broadly cupulate, 4–6 mm wide, the lobes somewhat longer than the tube; fr smooth, 1.5–2 mm; 2n=22, 44. Native of Eurasia, intr. in our range from N. Engl. and s. Que. to N.J. May–July. (Asperula g.; A. galioides)