Strand and Dune Flora of the Pacific Coast 169 



Atriplex californica Moq. (fig. 8/) is a minor species in the 

 dune shrub community and occurs also in brackish areas border- 

 ing salt marshes. It ranges from Bodega Point, Sonoma County, 

 southward to Cedros Island, Baja California. It is not closely 

 related to any other North American species of the genus, but 

 seems to be derived from ancestral stock no longer represented 

 (Hall and Clements, 1923). 



Cardionerna ramosissima (H. and A.) Nelson and MacBride 

 [Pentacaena ramosissima H. and A.] (fig. ^a) is a prostrate 

 perennial which grows on bare sand that is more or less stabi- 

 lized. It ranges from Moclips, Washington, southward to Ro- 

 sario, Baja California. The genus is principally of western South 

 America, where it is not exclusively coastal. Our species occurs 

 upon the coasts of Chile and Ecuador. 



Erysimum capitatum (Dougl.) Greene (fig. 9^) is a compara- 

 tively infrequent subordinate in the dune shrub community, 

 there producing erect, sparsely leaved stems as much as two feet 

 high. It also grows close to the shore on partly stabilized sand, 

 where it assumes a very different habit, becoming a typical 

 rosette plant with closely placed leaves lying flat upon the sand 

 and a practically sessile flower cluster. It ranges from Point St. 

 George, northern California, southward to San Diego County. 

 The genus Erysimum has had no satisfactory taxonomic treat- 

 ment. Several species of western North America are similar in 

 aspect to E. capitatum. 



Potentilla lindleyi Greene [Horkelia cuneata Lindl.] (fig. 

 gc) is frequent in thoroughly stabilized sand. It ranges from 

 Santa Cruz southward to Ballona, Los Angeles County, and 

 possibly farther in both directions. For the most part it is closely 

 confined to the coast, but var. puherula Jepson of southern Cali- 

 fornia extends eastward to the San Bernardino Valley (Jepson, 



