154 



The Plant World 



the rock vegetation of the ocean shore, and with those plants that 

 constitute a typical sand dune flora. In order to maintain them- 

 selves and produce fertile seed in the midst of such highly modi- 

 fied conditions as obtain in the sand dunes and under the direct 

 influence of salt mist and rock substratum these wandering 

 mesophytic plants are compelled to undergo a variety of struc- 

 tural modifications already alluded to in another paper. It 

 might prove highly instructive to carry out an exhaustive study 

 of the relation of many or all of these plants to their environ- 



Fig. 2. The mutual mingling of Monterey pines and live oaks near Pacific Grove. 



mental influences. Such a study might incidentally throw some 

 light upon certain hereditary problems. 



The Forest Societies. 

 By far the greater portion of Monterey Peninsula is covered 

 with two well defined formations, i. e. pine and cypress. The 

 former is the greater in extent and in the early history of the 

 state must have occupied fully nine-tenths of the total area of 

 the peninsula. 



