CALIFORNIA ACADEMY OF SCIENCES. 223 



Alchemilla OCCIDENTALIS, Nlltt. 

 tElBES SANGUINEUS!, Pursh. 

 TlLLJEA MINIMA, Miei'S. 



Epilobium minutum, Lincll. Two or three plants found 

 in the locality indicated by Dr. Palmer. 



fCENOTHERA GUADALUPENSIS, Watson. 

 fMENTZELIA DISPERSA, "Watson. 



*Mentzelia micrantha, Torr. & Gray. Only on the beach, 

 near the landing. Probably of recent introduction. 



Echinocystis Guadalupensis, Naudin. The fruit of this 

 species is conspicuously flattened laterally. 



-Mamillaria Goodridgii, Scheer. A single specimen, of 

 fair size and in flower, toward the south end of the island. 



*Opuntia prolifera, Engelm. Rather common on pre- 

 cipitous, rocky places near the sea, on both sides of the is- 

 land, but especially plentiful near the landing; smaller than 

 in California. 



*Mesembryanthemum crystallinum, Linn. On the beach 

 at the landing. 



Daucus pusillus, Michx. 



Galium Aparine, Linn. 



t Galium angulosum, Gray. 



Corethrogyne cana. Diplostephium canum, Gray, Proc. 

 Am. Acad. xi. 75. I find this shrub generically inseparable 

 from Corethrogyne detonsa, Greeue, Bull. Ton*. Club, x. 41, 

 and differing from it mainly in having thinner, entire leaves, 

 smaller heads, and probably yellow corollas; for, although 

 it was not found in flower by me, I have no reason to doubt 

 the statement of so careful an observer as Dr. Palmer. If 



