Xylorhiza is a genus of flowering plants in the family Asteraceae, known as woodyasters.Nuttall, Thomas. 1840. Transactions of the American Philosophical Society, new series 7: 297–298 in EnglishTropicos, Xylorhiza Nutt. These are daisylike wildflowers usually having blue to purple or white ray flowers with yellow centers of disc florets. Woodyasters are native to western North America.
SpeciesBiota of North America Program 2013 county distribution maps Xylorhiza cognata - Mecca woodyaster - California (Imperial + Riverside Counties) Xylorhiza confertifolia - Henrieville woodyaster - Utah (Kane, Wayne, + Garfield Counties) Xylorhiza cronquistii - Cronquist's woodyaster - Utah (Kane + Garfield Counties) Xylorhiza frutescens - Baja California Xylorhiza glabriuscula - smooth woodyaster - Wyoming, Utah (Daggett County), Colorado (Routt + Moffat Counties), Montana (Carbon County), South Dakota (Harding, Butte, Fall River Counties) Xylorhiza orcuttii - Orcutt's aster - California (Imperial + San Diego Counties) Xylorhiza panamintensis - Death Valley National Park Xylorhiza tortifolia - Mojave woodyaster - California, Nevada, Utah, Arizona Xylorhiza venusta - charming woodyaster - Utah, Colorado, New Mexico (Colfax County) Xylorhiza wrightii - Big Bend woodyaster - western Texas, Chihuahua
References
External links USDA Plants Profile for Xylorhiza (woodyasters) Calflfora Database: Xylorhiza species in California — images + info links. Jepson Manual eFlora (TJM2) treatment of Xylorhiza