Smithsonian Report, 1 91 1 .— Standley. 



Plate 6. 



Eg -\$&* ^<;< 



>•<*',:•■ 







A. Viznaga or Barrel Cactus iEchinocactus wislizend. 



. "3"*« 



B- Old Mescal Pit in the Guadalupe Mountains New Mexico. 



