218 ALLAN HAXCOCK PACIFIC EXPEDITIONS VOL. 13 



PLATE 8 



Fig. 18. Angel de la Guardia Island. Typically sparse desert vegetation 

 on washes and fans with a scattered grove of Pachycereiis 

 Pnnc/lei. 



Fig. 19. Angel de la Guardia Island. The effect of wind on the 

 sarcophytic tree, Pachycormus discolor pubesccns, along a rocky 

 crest. 



Fig. 20. Angel de la Guardia Island. Sparse Desert Shrub on ari east 

 exposure with Pachycereus Pringlei on the lower gentler slopes. 



