94 
range, from which an ascent was made of a mountain about 4000 
feet in height, consisting of disintegrating granite, with some vol- 
canic rock. The loose texture of the rock and the very low 
relative humidity of the air gave extreme conditions of aridity, 
and a great variety of desert forms were noted and collected in 
the course of the ascent. As this mountain had probably not 
been climbed before, a small monument was erected in which a 
brass gun cleaner and a pair of spectacles were placed. Ephedra, 
Fic. 15. Ocotillo (Fouguzeria splendens) near San Felipe Bay, Baja California. 
Euphorbia, Asclepias, Opuntia, and Mamimilaria were encoun- 
tered at the lower levels, while standing out on the sky line 
of the granite ridges were .4gave and Yucca, the dry subtropical 
climate at the summit being more suitable for these plants than 
the warmer lower levels. The locality seemed to be character- 
ized by a large number of plants with a latex or milky juice. A 
number of living specimens were secured at this place and have 
been safely brought to the Garden. 
