VOL. 1] Plants of Santa Catalina [sland. 109 
southern, and the greater portion of them will probably be found in 
northern Baja California when that region shall have been thorough- 
ly explored. Ina previous* paper it was remarked that the floras 
of Magdalena and Margarita islands were more northern than that 
of the adjacent mainlands. These variations from the mainland 
distribution are apparently the effect of the insular condition which 
moderates the extremes of temperature and tends to produce a 
warmer mean temperature in the northern and a cooler in the 
southern islands than, that of their respective adjacent mainlands. 
Within the last few years, Mr. W. S. Lyon has spent some time 
upon Santa Catalina as well as on San Clemente, and made consid- 
erable collections, publishing the results with notes upon previous 
collectors and most interesting descriptions of the islands in the 
Botanical Gazette of August and December, 1886. His list of Santa 
Catalina plants contains one hundred and fifty species and notes, 
concerning a few of them may be of interest. 
CrossosoMaA CALIFORNICUM Nutt. Grows to a height of ten 
feet or more, and is quite showy with its numerous white flowers. 
Mr. Vaslit sayst the carpels are often as many as six and sometimes 
seven. I have frequently found as many as nine. A species very 
closely allied, if not too near, is found in the San Bernardino Mount- 
ains, and is very abundant in Lower California, below San Quintin. 
LAVATERA ASSURGENTIFLORA Kell. This was not included by 
Mr. Lyon in his list, but was mentioned in the introduction as grow- 
ing luxuriantly upon Bird Island, said to be distant from Santa Cat- 
alina two miles. I found it growing upon a small rock or island 
near the isthmus and much nearer the main island. The rock has 
a very small area of shallow earth upon it, and but a few depauper- 
ate specimens which had already lost most of their leaves grow there 
in the nearly dried out soil. It was reported as growing luxuriant- 
ly upon an islet, perhaps the one visited.by Mr. Lyon, northwest of 
this one. The local name of the plant is “ Malva rosa.’’ The spe- 
cies was described from a cultivated specimen obtained by Dr. 
Trask from a garden in Santa Barbara. The seed he was told came 
from the island of Anacapa, which, properly speaking, is the broken 
off rocky tail of Santa Cruz. It has not since been reported from 
the original locality, but has been found on San Miguel, San Cle- 
*Proc. Cal. Acad., ser. 2, li, 120. 
a2 Vhee 4; 271 
