Much like no. 8 [Cornus canadensis L.]; stems 5-15 cm, regularly bearing a few pairs of cauline lvs as well as the terminal cluster or pair and often emitting lateral branches from their axils; lvs sessile; lateral veins usually 2 pairs, arising from or very near the base of the lf; bracts white, 1 cm; fls dark purple; stone lightly grooved, bilocular; 2n=22. Wet woods and rocks; circumboreal, s. in Amer. to Nf., N.S., and Que. (Chamaepericlymenum s.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.