PLATE X. 
Fig. 1. An instance where chaparral constitutes the vegetation of sotol country; the even, close 
cropped bunches are Ephedra antisyphilitica. 
Fig. 2. A single clump of Euphorbia antisyphilitica; occurs at Langtry, Texas, but is very 
abundant and characteristic in the Terlingua district in the Great Bend of the Rio Grande. 
