Xylorhiza tortifolia var. imberbis (Cronq.) T.J. Wats.
Asteraceae
M. Lane (Dec 1993)
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P.S. Martin
s.n.
1973-04-18
April 18,1973
T.R. Van Devender
United States, Arizona, Mohave County, Colorado River Mile 274.5 R, slope above north shore of Lake Mead, 5 mi upstream from Pierce Ferry; Muav Gate; Lake Mead National Recreation Area