Chamaepericlymenum

Rare individuals of this genus in New England show multiple nodes with opposite leaves and/or purple-tipped petals. These plants are hypothesized by Murrell (1994) to be the product of hybridization between Chamaepericlymenum canadense and C. suecica (L.) Aschers. & Graebn. backcrossed to C. canadense. Reference: Murrell (1994).