Nov. io, 1913 
Pubescent-Fruited Species of Prunus 
149 
southward into Lower California, is an inhabitant of much lower altitudes, 
at least in California. There it occurs at from 500 to 3,000 feet in the 
upper margin of the Lower Sonoran, but chiefly in the Upper Sonoran 
zone, extending a little below the zone of light winter snow, though subject 
to intense heat and prolonged drought in summer. (See map, fig. 1.) 
Most similar to this species in habitat and requirements, though remote 
in relationship, is the “desert almond” 1 (Prunus fasciculata ). This fruit 
Fig. i.—M ap of the southwestern part of the United States, showing the range of Prunus andersonit , 
Prunus fasciculata, and Prunus eriogyna, n. sp. 
occurs in widely scattered localities over a range which includes southern 
Nevada and California, together with the adjacent portions of Utah and 
Arizona. It overlaps portions of the areas of both Prunus andersonii and 
Prunus eriogyna , but, like the latter, is found in the upper margin of the 
Lower Sonoran and in the Upper Sonoran zones. (See map, fig. 1.) It 
1 Called “desert range almond” by Dr. C. H. Merriam in notes on the distribution of trees and shrubs in 
the deserts . . . U. S. Dept. Agr., Bur. Biol. Survey, North American Fauna, no. 7, p. 301, 1893. 
