iooq] 



OLSSON-SEFFER— VEGETATION ON SEA SHORES 



"5 



Most of the sand-strand plants are not able to withstand partial 

 burying by the shifting sand; consequently it very often happens that 



Fig. i.—Cupressus macrocarpa on Cypress Point, Monterev, Cal., showing influ 

 ence of wind. (Photograph by author.) 



FlG. 2 -t? p * 



juvenated Salix dune at San Francisco, Cal. (Photograph by author.) 



b y ° ^ C0mmu nities are suddenly destroyed and their place taken up 

 Somet antS ablC t0 endure more or less complete covering by sand. 



