116 



U.S. NATIONAL MUSEUM BULLETIN 2 55 



Figure 3. — Yucca brevifolia, a lucinbcr uf the section Clisiucarpa, Kern Co., Calif., 16 

 miles south of Weldon (photographed Apr. 26, 1964, by J.A. Powell). This species is 

 known to attain a height of 18 m. or more. 



