Xylorhiza tortifolia var. imberbis
Brittonia 29: 211. 1977.
Common names: Smooth Mojave woody-aster
Endemic
Basionym: Machaeranthera tortifolia var. imberbis Cronquist Leafl. W. Bot. 10: 12. 1963
Revision as of 20:53, 27 May 2020 by imported>Volume Importer
Stems, leaves, and involucres glabrous, stipitate-glandular. Leaf margins sparsely piloso-villous to puberulent. 2n = 12.
Phenology: Flowering Apr–May(–Jun).
Habitat: Sandy or gravelly slopes and flats, in pinyon-juniper, sagebrush, and blackbrush zones
Elevation: 600–1900 m
Distribution
Ariz., Nev., Utah.
Discussion
The geographic distribution of var. imberbis usually follows the canyons of the Colorado River of Utah and adjacent Arizona at least to Toroweap Point; it also occurs in Clark and Nye counties, Nevada, where it intergrades with var. tortifolia (A. Cronquist 1994).
Selected References
None.
Lower Taxa
None.