(315) 
salt-marshes being the complete list.6 Of these strictly maritime 
species, Eriogonum parvifolium extends northward to Monterey, 
and Airiplex Breweri to Santa Barbara. The other species are 
also confined to the California coast, but extend farther northward 
into northern California. 
The Coastal Sub-district comprises the valleys and rolling hills 
along the coast, and the coast slope of the foothills and mountains 
which separate them from the interior valleys. Its inland boun- 
dary extends along the southern slope of the Santa Ynez Moun- 
tains, the coast slope of the mountains of Ventura County, and 
southward through the San Fernando and Santa Monica Moun- 
tains to the Santa Ana Mountains, thence along the western slope 
of the Palomar Mountains where it blends with the Interior Sub- 
district. 
The principal plant formations of this area are the mesa and 
rolling hills, the alluvial, the oak-grove, the canyon, and the chap- 
arral. ‘The mesas and rolling grassy hills are characterized chiefly 
by the absence of woody plants rather than by any peculiar species. 
Along the inner boundary of this formation and merging with the 
Interior Sub-district are park-like groves of oaks. North of the 
Santa Monica Mountains, along their northern base, and in the 
Simi, Newhall and Ojai Valleys handsome trees of Quercus lobata 
abound. This species does not extend south of the Santa Monica 
Mountains, but its place south of this range is taken by Quercus 
Engelmannit which, together with Quercus agrifolia, covers con- 
siderable area about Pasadena, Santa Anita, and Fallbrook. 
The following trees and shrubs are mostly confined to the Coastal 
Sub-district: 
Myrica californica Malacothamnus Nuttallii 
Juglans californica Ceanothus spinosus 
Quercus lobata Ceanothus sorediatus 
Quercus Engelmannii Ceanothus oliganthus 
Grossularia speciosa Ceanothus megacarpus 
Grossularia amara Arbutus Menztesit 
Sericotheca franciscana Trichostema lanatum 
Lupinus longifolius Ramona niveum 
6In addition to these true shrubs there are a number of suffrutescent peren- 
nials that are also confined to this sub-district. Among these may be men- 
tioned Cheiranthus suffrutescens, Sphacrostigma viridescens, Batis maritima, 
and Salicornia ambigua. 
