Gutierrezia petradoria is a species of flowering plant in the family Asteraceae known by the common names San Pedro snakeweed and goldenrod snakeweedAlbee, B.J., L.M. Shultz, and S. Goodrich. "Atlas of the vascular plants of Utah" − Utah Museum Natural History Occasional Publication 7, 1988, Salt Lake City, Utah.
Distribution The plant is endemic to western Utah, located the Southwestern United States.Biota of North America Program 2014 county distribution map It is native to the Lower Sevier River watershed, within Juab County and Millard County.Natureserve.org (Version 7.1): Comprehensive Report for Gutierrezia petradoria
Description Gutierrezia petradoria is a perennial herb to woody subshrub, growing up to in height.
At the end of each branch there is an inflorescence of one or a few flower heads. The heads are larger than for most of the species in the genus. The head contains 5-13 disc florets with 4-10 yellow ray florets around the edge. The ray flowers are up to long, much larger and showier than in the case of most other species in the genus.Flora of North America, Gutierrezia petradoria (S. L. Welsh & S. Goodrich) S. L. Welsh, 1983. Goldenrod snakeweed
References
External links USDA Plants Profile for Gutierrezia petradoria (San Pedro snakeweed) Photo of herbarium specimen collected in Utah in 1980 — isotype of Gutierrezia petradoria.