Key to Wisconsin Phrymaceae

Author: John G. Zaborsky

• 1a.Flowers sessile, reflexed in fruit, subtended by minute bracts and held in terminal inflorescences; upper three calyx lobes hooked at their apices; fruit an achene Phryma

• 1b.Flowers pedicellate, spreading to ascending in fruit, borne singly in the leaf axils; all calyx lobes unhooked; fruit a capsule 2

• 2a.Flowers bluish to purple; stems 4-angled Mimulus

• 2b. Flowers yellow; stems with numerous ridges Erythranthe