Enceliopsis is a small genus of flowering plants in the family Asteraceae (order Asterales), commonly known as sunrays. The genus contains only three species, all native to arid and semi-arid regions of the western United States. Enceliopsis plants are herbaceous to shrubby perennials closely resembling the daisylike plants of the related genus Encelia, bearing showy yellow ray flowers around a central disk — the characteristic composite flower head of the sunflower family.
The three recognized species occupy distinct but overlapping ranges in the American Southwest. Enceliopsis nudicaulis (nakedstem sunray) is the most widespread, occurring across California, Arizona, Nevada, Utah, Colorado, and Idaho. Enceliopsis argophylla (silverleaf sunray), named for its silvery-hairy foliage, is restricted to a narrow tri-state corner of Arizona, Nevada, and Utah. Enceliopsis covillei (Panamint daisy) is the rarest member of the genus, endemic to Inyo County in California, and is associated with the Panamint Range of the Mojave Desert.
Distribution
All three species of Enceliopsis are native to the western United States, growing in arid and desert habitats. E. nudicaulis has the broadest range, spanning California, Arizona, Nevada, Utah, Colorado, and Idaho. E. argophylla is confined to a small area where Arizona, Nevada, and Utah meet, while E. covillei is restricted to Inyo County, California.
Taxonomy Notes
Enceliopsis belongs to the family Asteraceae (order Asterales) and is closely allied to the genus Encelia, sharing the characteristic composite flower heads of that group. GBIF recognizes three accepted species in the genus. The genus name has not been formally attributed to an author in the GBIF backbone.
