Common Name

Scientific Name

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Photo by Ben Franklin
Photo Courtesy of Utah Division of Wildlife Resources

Jones' cycladenia, Cycladenia humilis var jonesii, is a Federally listed threatened plant restricted to the canyonlands of the Colorado Plateau in Emery County, Garfield County, Grand County, and Kane County, Utah, as well as in immediately adjacent Coconino County, Arizona. A member of the dogbane family, this taxon is a rhizomatous herb with round, somewhat succulent leaves, and small rose-pink hairy flowers that bloom from mid-April to early June. Jones' cycladenia grows in gypsiferous soils that are derived from the Summerville, Cutler, and Chinle formations; they are shallow, fine textured, and intermixed with rock fragments. The species can be found in Eriogonum-Ephedra, mixed desert shrub, and scattered pinyon-juniper communities, at elevations ranging from 1219 to 2075 meters. Off-road vehicle activity and the presence of mining claims and oil and gas leases on or immediately adjacent to known sites are the biggest threats to this species.


  • Sipes, S.D., P.G. Wolf, V.J. Tepedino, and J. Boettiger. 1994. Final report: population genetics and ecology of Jones' cycladenia. Prepared for USDI Bureau of Land Management, Utah State Office, Salt Lake City. 27 pp. + attachments.

  • Spence, J.R. 1994. Demography and monitoring of the threatened Cycladenia jonesii Eastw. (Apocynaceae), Glen Canyon National Recreation Area. Prepared for USDI National Park Service, Glen Canyon Natl. Rec. Area, Page, AZ. 12 pp. + tables, figures

  • Welsh, S.L., N.D. Atwood, S. Goodrich and L.C. Higgins [eds.]. 1993. A Utah flora (2nd ed., revised). Provo, UT: Brigham Young Univ. 986 pp.