California perianth liverwort
The leaves of this species are pale green dorsally and have purple ascending margins and dark purple undersides. They also have thallus edges that tend to curl upward, exposing the dark underside when dry. The thalli are simple or somewhat sparingly (1-3 times) dichotomous, and 8 to 25 mm long. The ultimate segments are emarginated, obovate, obcordate, or broadly oblong, indistinctly areolate, and 4 to 12 mm in maximum width.