66 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Transition species ascend even to the Hudsonian zone, producing thus 

 a strange mixture of lowland and subalpine plants. 



From the isolated position of these mountains together with their 

 considerable elevation, some peculiarities would naturally be presup- 

 posed. The flora is, however, exceedingl}' similar to that of the 

 Cascade ^Mountains. One misses, to be sure, a few conspicuous Cas- 

 cade inhabitants, such as Saxifraga tolmiei, Lupinvs h/al/ll, Geidlann 

 calycos(U and Erireplialns Jedophyllvs^ but the great majority of the 

 plants are the same as those of the Cascades. The species which are 

 not of the Cascade ^Mountains present, however, some interesting 

 problems. Up to the present time there are only al)out ten species 

 known to be peculiar to the Olympics, and these are all species of 

 high altitude and most of them abundant as to individuals. They 

 are as follows : 



A^ter punficupitatus. Venecia flettii: 



CainpciiniJa piperi. Spiraea ]irii(lrr><oiii. 



Epilohiiiiii iiiirahilr. Syiiflturis pinnatifida toiucn- 

 Ertisiiiniiii (irriiicdla. fosa. 



Poleinoiiiiiiii ainocnum. Viola ffettii. 



Campanula piperi is nearly related to an Alaskan species. The 

 others have their nearest relatives in Cascade and Sierra forms. 



Some few sjjecies have a strangely isolated station in the Olympics. 

 Phaca hookeriana^ a species of the mountains of northern California 

 and adjacent Nevada, also occurs in the Blue Mountains and then, 

 ap])arently vaulting the Cascades, reappears in the Olympics. 



Syntliyris pinnati^da toriwntosa likewise has no close relative ex- 

 cept in the Wasatch and Rocky Mountains. 



Thermopsis montana^ collected in Chehalis County, is not other- 

 wise known west of the eastern border of Washington. 



Therofon ma']U8 intermediuni is a subspecies whose parent species 

 occurs in southeastern Oregon and California, and strangely enough 

 reapi^ears in abundance in the Bitterroots, though unknown in the 

 Blue ^Mountains. 



Jledy^avum horeale,, a very abundant species in the Olympics, is 

 not known from the Cascades at all, though occurring in the north- 

 ern Rockies and eastward to New England. In the northern Cas- 

 cades and in the Bitterroots appears the closely related species H. 

 sidplii/rescens. 



Heuchera racemosa is an abundant si^ecies in the higher Olympics. 

 Otherwise it is a very rare plant, on Mount Adams and on Mount 

 Rainier. 



Further explorations of these mountains are likely to disclose 

 other peculiar species. These should be sought especially on the 

 highest peaks. 



