Taraxia

Taraxia is a small genus of flowering plants in the family Onagraceae, native to western Canada and the western and west-central United States. Nuclear DNA evidence shows that it is sister to a clade containing all genera in the tribe Onagreae except for Oenothera, Eulobus, and Chylismia.

Species
The following species are accepted:
 * Taraxia breviflora (Torr. & A.Gray) Nutt. ex Small
 * Taraxia ovata (Nutt.) Small
 * Taraxia subacaulis (Pursh) Rydb.
 * Taraxia tanacetifolia (Torr. & A.Gray) Piper