DUNE VEGETATION AT SAN FRANCISCO 199 



Polygonaceae 

 Chorizanthe -pungens Benth. 



Annual; looks like a small Eriogonum. 

 Eriogonum latifolium Smith. 



About 6 dm. tall. 

 Rumex acetosella L., Sheep Sorrel. 



Introduced weed in eastern part of dune area. 

 Rumex salicifolius Weinm., Willow Dock. 



In low places with established vegetation; 3 to 5 dm. tall. 

 Polygonum paronychia C. & S. 



About 2 dm. tall. The specific name suggests the appearance; the plant 

 does not look at all like a Polygonum. 



Nyctaginaceae 



* Abronia latifolia Esch., Yellow Sand Verbena. 



Forming large prostrate mats, often one meter across. 



Tetragoniaceae 



Mesembryanthemum aequilaterale Haworth, Ice Plant. 



Occasional, especially within a moderate distance (100-200 meters) from the 

 ocean. 



Corrigiolaceae 



Pentacaena ramosissima H. & A., Sand Mat. 

 Prostrate; forming dense mats. 



Papaveraceae 



Eschscholtzia californica Cham., California Poppy. 



This annual, which is so abundant in many parts of the state, is present 

 occasionally on well established areas; plants are of about the usual height. 



Rosaceae 



Rubus vitifolius C. & S., Blackberry. 



Only in well established areas; moist soil. 

 *Fragana chilensis Duch., Sand Strawberry. 



Prostrate; spreading by runners. 



Fabaceae 



*Lupinus arboreus Sims., Tree Lupine. 



This shrubby yellow-flowered species reaches a height of 6 dm., in exposed 

 places but may be 1 to 2 meters tall where sheltered from the wind. 

 *Lupinus chamissonis Esch. 



This blue-flowered species is mostly 6 to 8 dm. tall; sometimes a meter high 

 when in large clumps. 



Anacardiaceae 



Rhus diversiloba T. & G., Poison Oak. 



In well established areas toward eastern limit of dune area. 



