(425 ) 
11. OPUNTIA CHLOROTICA Engelm. & Bigel. Proc. Am. 
Acad. $3) 291.) 1856. 
Type locality: “Western Colorado Country, between New 
Mexico and California, from the San Francisco Mountains to 
Mohave Creek.” 
Distribution: New Mexico, westward through Arizona and 
southern Nevada to the Mohave Desert, and southward to Sonora. 
I have not seen any southern California specimens. Lower 
Sonoran. 
12. OPUNTIA OCCIDENTALIS Engelm. & Bigel. Proc. 
Am. Acad. 3: 291. 1856. 
Opuntia Engelmann occidentalis Engelm. in Bot. Calif. 1: 248. 
1876. 
Opuntia Lindheimeri occidentalis Coult. Contr. Nat. Herb. 3: 421. 
1896. 
Type locality: “On the western slope of the California moun- 
tains, near San Diego and Los Angeles.” 
Distribution: The common prickly pear of the coast slope of 
southern California, often growing in dense thickets of consider- 
able area. Upper and Lower Sonoran. 
Specimens examined: Los Angeles, Hasse 6169; near Pasadena, 
MacDougal, 1906; Mesa Grande, Schaller; Pala, Schaller. 
13. OPUNTIA LITTORALIS (Engelm.) Britton & Rose, Smiths. 
Miscel. Coll. 50: 529. 1908. 
Opuntia Engelmanni littoralis Engelm. in Bot. Calif. 1: 248. 1876. 
Opuntia Lindheimert littoralis Coult. Contr. Nat. Herb. 3: 422. 
1896. 
Type locality: “On the coast from Santa Barbara and the islands 
in its gulf to San Diego, and southward.” 
Distribution: Bluffs along the seashore of southern California, 
and on the islands off the coast. Upper Sonoran. 
Specimens examined: Playa del Rey, Abrams 2515. 
3. ECHINOCACTUS. 
Stems simple, large, globose to cylindrical (“‘barrel-cactus”); ovary scales 
ovate orbicular; fruit not woolly. 
Central spine 1; flowers purple. 1. E. Emory. 
