Box.— Vol. I.] EASl'lFOOD— STUDIES FROM THE HERBARIUM. IO5 



margins and shapes of the leaves. These island specimens 

 have smaller flowers than the mainland forms common 

 along the southern coast of California; but they agree in 

 the flowers fading green, in having similar capsules, and 

 in the leaves forming small rosettes at the ends of the 

 branchlets. 



Since the original description of CE . cheiranthifolia is 

 not available and according to Professor Greene does not 

 fit either this or CE . spiralis, it seems best at present to 

 leave these island plants under Hooker's name. 



FICOIDE^. 



46. Mesembryanthemum nodiflorum Z., Sp. PL, p. 480. 

 The specimens from San Nicolas are identical with those 



collected elsewhere in Southern California. They differ 

 somewhat from a plant collected in Sardinia by Reverchon, 

 (ex. Herb. Ball.) in the Herbarium of the Academy. In 

 this genus it is very difficult to be certain of dried speci- 

 mens where the species are closely related. On San Nico- 

 las it was frequent on the beaches. The flowers are white. 



46^. Mesembryanthemum crystallinum L. — This was 

 abundant, growing on cliffs 1000 ft. high. No specimens 

 were collected. Mrs. Trask writes that it grew knee high and 

 that in walking through it her boots and leggins were soaked 

 thoroughly with the sap. It rendered climbing dangerous 

 as the rocks became very slippery and there were precipices 

 everywhere on the cliffs. It is found on all the islands. 



CACTACE^. 



47. Opuntia. — This is probably O. Engehnanni Salm., 

 var. littoralis Engelm. 



Mrs. Trask reports it as identical with this species as she 

 knows it on Santa Catalina. The specimen consists of a 

 flower only and that without the ovary. It is reported from 

 all the islands except San Clemente. 



2 Sept. 12, 189S. 



