FLORA OF THE SANTA BARBARA ISLANDS. 225 



The island specimens are more denticulate than the more 

 or less denticulate forms of the mainland. 



Thysanocarpus laciniatus, Nutt. =7: ramosus, Greene. 



Calandrinia Breweri, Watson. 



Appears to be more abundant upon Santa Cruz Island 

 than on the mainland. 



Rhamnus crocea, Nutt. ^=E. insularis, Kellogg. 



The large leaved island Rhamnus is abundant in the Santa 

 Inez mountains at the higher eleA^ations, but is always a 

 bush less than six feet in height. A smaller leaved form 

 grows at lower elevations. 



This species in some localities of the more northern por- 

 tions of the State, with the habit of a bush, becomes as tall 

 as upon Santa Cruz, where it is a fine example of a main- 

 land bush becoming an insular tree. 



Rhus ovata, Watson. 



All the species of Bhiis are larger and more tree-like upon 

 the island than on the mainland, even E. diversiloba almost 

 becomes a small tree. In some of the southwest canons of 

 Santa Cruz near the sea, R. ovata, with a single trunk and 

 compact rounded head, resembled in appearance small ap- 

 ple trees, and in full bloom presented a fine appearance, 

 very different from the bush of the summits of the mainland 

 mountains. It is one of the very first to start forth anew 

 from its roots after all vegetation has apparently been killed 

 by fire. 



Cercocarpus parvifolius, Nutt. ^G. betidcefolius, Nutt. 

 A mainland shrub that often is an insular tree. 



Galium Oalifornicum, Hook. & Arn. ^G. flaccidum, 

 Greene. 



As noted in the Flora of California this species often has 

 a pubescent ovary, and the pubescence sometimes persists 

 upon the mature white fruit. 



