68 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



KLICKITAT COUNTY. 



A considerable number of species reach their northernmost exten- 

 sion in Klickitat County or in adjacent Skamania County and are 

 not otherwise known to occur in Washington. In some cases a long 

 distance to the southward intervenes before the species again occurs. 

 This local northern distribution is perhaps due to the association of 

 Humid and Arid Transition conditions and a warm southern slope 

 exposure, the resultant combination being highly peculiar. 



The species to which the above remarks apply are: 



Arnica cradiata. Juncus uncialis. 



Az(^>Ua caroUiiiana. LepUUnm nitidum. 



Browns orcuttiatius. Melica fiigaa: 



CcannthuH prostratus. Miviulna dougJasU. 



Ccatwt fills ihi/rsiflorm. T^eiuophita scpiilta. 



CoUiiisia rattani. Orogenia Unearifolia. 



VolUnsia sparsiflora. Patiicum hirticaiiloii. 



CinKtglossum grandc. J'israria scfigera. 



Cypripcdium fasciciihitiini. Plagiobothrys uothofulviis. 



Epilobiinn ursinuvi. Polygonum austinar. 



Eriogonum nudum. Polygonum greenci. 



Eryng'inm- pctiolatum. Scribncria bolandcri. 



FcHtucn confusa. ToncUa collinsioidcs. 



Garrya frcniontii. Trifolium ciliolaiuni. 



(Jilia hohnidrri. Viburnum cUipticum. 



Gilia divaricata. Viola shcltoni. 

 Hemicarpha occidentalis. 



Some of these species will perhaps be found in Washington outside 

 of Klickitat County, but the flora is well enough explored to make it 

 quite certain that this will Ik? the case with but few of them. 



MOUNT SfUART AND THE WENACHE MOUNTAINS. 



Mount Stuart, a tall granitic peak in Kittitas County, and the sur- 

 rounding Wenache Mountains, have long been of peculiar interest 

 botanically, owing to the considerable list of species which are there 

 localized. This peculiar localization of species, several of them with- 

 out close relatives, seems to be in a measure associated with the 

 granitic character of the region. Recent investigations have shown 

 that most of the species occur also to the northward, but that they are 

 confined almost entirely to granitic soils of the crest of the Cascades. 



Among the species thus restricted are the following : 



Arahis ichitedii. Delphinium xantholcucum, 



Cacnliopsis nardosmia glahrata. Douglasia dentata.- 



Calamagrostis tireedyi. Erigeron leibergii. 



Calochortus lyallii. Leptotaenia watsoni. 



Castilleja elmeri. Leicisia tweedyi. 



Cynomarathrum hrandegei. Pedicularis ornithorhyncha. 



Delphinium, viridescens. Poa canbyi. 



