198 FRANCIS RAM ALE Y 



SYSTEMATIC LIST OF SPECIES 



Following is a systematic list of dune species with various} 

 annotations. It may be well once more to remind the reader 

 that the introduced plants .do not occur on the typical dunes 

 at all, which are still in their primaeval condition. Plants 

 marked with an asterisk are the most characteristic dune species. 



The writer is under obligation to Prof. Harvey M. Hall of the 

 University of California for reading and correcting the manu- 

 script of this paper and for many courtesies extended while the 

 writer was in California. 



Polypodiaceae 



Pteridium aquilinum pubescens Underw., Common Brake. 



Only in well established areas near the eastern limit of dunes. 



Poaceae 



Choetochloa glauca (L.) Scrib., Bristly Foxtail. 



Introduced annual; low places only, with other weeds. 

 Ammophila arenaria (L.) Link., Marram Grass. 



Planted as a sand binder; has become fairly well established in places close 

 to the ocean shore; also on a few dunes where it has evidently been freely 

 planted. 

 'Festuca sciuroides Roth., Squirrel-tail Fescue. 



An introduced annual; only on well-established sand. 

 Bromus hordaceus L., Soft Chess. 



'This introduced annual, common over wide stretches of California, is pres- 

 ent wherever other weeds occur in well-established areas. 



Cyperaceae 



Eleocharis acicularis R. Br., Slender Spike-rush. 

 Low, wet places among willows. 



Juncaceae 



Juncus le^eiirii Boland., Salt Rush. 



In low places. 

 Juncus phoeocephalus Engelm., Rush. 



Low areas, among willows. 



Salicaceae 



*Salix lasiolepis Benth., Arroyo Willow. 

 Here it is mostly 1 to 3 meters tall. 



