OREGON COAST FLORA 339 



Pentacsena ramosissima Salicornia pacifica 



*Picea sitchensis *Salix hookeriana 



*Plantago lanceolata Scripus americanus 



P. bigelovii S. riparius 



*P. major *Sisyrinchium californicum 



P. niaritima Spergularia macrotheca var. 

 *Poa annua scariose 



P. macrantha S. sparsiflora 



Polygonum paronychea Statice armeria 



*Potentilla anserina Stellaria humifusa var. oblongi- 



Rumex acetosella folia 



R. maritimus var. fueginus Tanacetum huronense 



*R. mexicanus *T. repens 



*Sagina occidentalis Triglochin maritima 



The species of this Hst marked with an asterisk are only inci- 

 dentally seashore or salt marsh plants and are found more or less 

 widely distributed in other situations ; the rest are ordinary halo- 

 phytes. On some species of the former group the effect of the 

 exceptional environment is very marked, on others it is scarcely 

 perceptible. It is noticeably more pronounced on those that occur 

 most abundantly and appear to have made themselves at home 

 among the true halophytes. These wuth their most prominent 

 characteristics are the following: 



Achillea millefolium. — Very low and stout, often only twelve to 

 fifteen centimeters in height; foliage ample, glabrous and succulent. 

 This is the variety nigricans. As we pass inland out of the influence 

 of salt water and high winds it is found to intergrade perfectly with 

 the usual Coast mountain form of the species. 



Aira praecox. — Stout, the culms radiately spreading and nearly 

 prostrate. 



Agrostis alba. — Culms and rootstocks poorly differentiated from 

 each other, long, abundantly branched, largely aerial but prostrate 

 and rooting, mostly sparingly leafy throughout, the leaves very short ; 

 panicles mostly very small and contracted. This is the variety 

 niaritima, and all intergrades with the typical form are found as we 

 recede from the maritime influence. 



Agrostis cxarata. — Remarkable for the very short, stout, spreading 

 culms, often no more than fifteen cm. long; panicles large and dense; 

 whole plant succulent. Intergrades perfectly with the typical form. 

 This is A. glomerata. 



Aster donglasii. — Extremely unlike the ordinary form of the 

 species. Stems very .short and depressed, often no more than ten to 

 fifteen centimeters in length; leaves crowded, thick and glabrous; 



