PLANTS FROM BAJA CALIFORNIA. 163 



Cereus Schottii Engelm. Known as "Lombre viejo" 

 or " cabeza vieja," so called from the resemblance of the 

 long, fine white spines of the top of the plant to a gray 

 head. — Comondu to San Quintin. 



Cereus Eruca. ( Plate VII. ) Prostrate, very rarely 

 branched, 13-ribbed, 3-4 feet long, 3-4 inches in diameter; 

 rooting from the under side of the older growth, decaying 

 at one end and growing forward at the other, generally in 

 patches of 20-30, probably originating from a common cen- 

 ter: areolae 4-6 mm. in diameter, separated about the same 

 distance : spines about 20, stout, ash-colored, less than an 

 inch long, the exterior cylindrical, the interior stouter, 

 angular, somewhat and the lower central one much flat- 

 tened, more than an inch long, angular, strongly reflexed: 

 flowers and fruit not seen. Common on the sand of Magda- 

 lena Island and about San Jorge. Its local name is "cliil- 

 enola." The manner of growth, with uplifted heads and 

 prominent reflexed spines, gives the plants a resemblance 

 to huge caterpillars. The flowers are said to be yellow. 



Cereus, sp. Small, vine-like, with neither flowers nor 

 fruit. — Santa Margarita and Magdalena Islands. 



Opuntia (Platopuntia), sp. Agreeing with the descrip- 

 tion of 0. chlorotica excepting as to its fruit. The flowers 

 are yellow or nearly red, the stems densely retrorsely 

 spinose. — Magdalena and Santa Margarita Islands, San 

 Jorge. 



Opuntia (Platopuntia), sp. Spines few, joints large, 

 flowers yellow. — Comondu. 



Opuntia (Platopuntia), sp. — Comondu cliffs. 



Opuntia Engelmanni Salm. var.— In the northern part of 

 the Peninsula. 



Opuntia Tuna Mill.— Cultivated at Comondu and Puris- 

 ima. 



Opuntia invicta. Low, condensed, branching: joints 4 



