264 BOTANICAL GAZETTE [OCTOBER 
The number of the endemic species of plants occurring on the 
coast islands was claimed, at one time, to be much larger 
than is admitted at present. Among them are the remark-, 
able monotypic Lyonothamnus, and Lavatera, with four too 
closely allied species, no two of them found on the same island, 
a genus which is unrepresented elsewhere in the western world. 
All the other endemic insular species belong to genera which 
have representatives on the adjacent mainland. Probably less 
than thirty of these species are valid, and of these several are 
no more than robust developments of plants of the neighbor- 
ing coast. Twelve of them are found on the islands off the 
Mexican coast, as well as on the Californian islands, so that 
hardly more than fifteen remain which are peculiar to the latter 
group.27 In the subjoined list species endemic to Santa Catalina 
and San Clemente are in italic; species too closely connected 
with continental ones, perhaps mere varieties of them, are 
designated by an asterisk. 
PLANTS OF SANTA CATALINA AND SAN CLEMENTE ISLANDS. 
Astragalus Nevinii Galium Catalinense Lyonothamnus floribundus 
*Ceanothus arboreus Gilia Nev Malacothrix foliosa 
*Cercocarpus Traskae eae eae insularis 
Crososoma Californica  Lavatera ssedtgentifiors Plantago dur 
*Eriogonum giganteum Phacelia Lyoni Quercus eae 
LEriophyllum Nevinii 
These distinctively insular species constitute but an insignifi- 
cant proportion, although a most interesting element, in the 
plant population of the islands, which, with these exceptions, is 
made up of species from the neighboring mainland. The islands 
are therefore to be considered as a subarea of the Cismontane 
area, and but slightly differentiated from the Coastal subarea. 
PHYTOGEOGRAPHICAL DIVISIONS, 
In accordance with the views set forth above, the life-areas 
of southern California are exhibited in the subjoined table. They 
are provisional merely, for not only does much remain to be 
learned of the distribution of our flora, but they are based on an 
examination of the flora alone, whereas the fauna and avifauna 
?7 BRANDEGEE, T.S. Zoe 1: 129. 
Sie 3". 
