52 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Folyyonum greenei. 

 Polygonum parryi. 

 J'tilocalais nutans. 

 PtilonvHa scal)ra. 

 fScribneria holandcri. 

 Scutellaria an gusti folia. 

 tSidalvea oregana. 

 Trichostcnia oblonguni. 



Trifoliuin ciliolatuin. 

 Trifoliuin cyatliifcruni. 

 Vrtica Itoloscriceu. 

 Valerianella macrocera. 

 Yeratrum calipyrn icuni. 

 Wyethia angustifoUa. 

 Zijgadcn us vcnenosus. 



JHK KOCKY 3I0UXTAIX ELE:MEXT. 



This consists of species Avhicli range from the foothills of the Rocky 

 Mountains and related chains northward or northwestward into the 

 Columbia Basin. Their number is much less than those of California 

 oriffin. Amons; them are the following: 



A (lenostegia capitata. 

 Agoseris glauca. 

 Antennaria ilhnorphu. 

 Arabis holhoelii. 

 Artemisia dracuiiculoides. 

 Cercocarptis ledifolius. 

 Cornus stolonifera. 

 Disporum majus. 

 Erigeron coryni hosus. 

 Eriogonuni elatuni. 

 Eriogon utn heracleoides. 

 Frasera speciosa. 

 Fritilluria pudica. 

 Guillardia aristata. 

 Galium nsperrimum. 

 Gilia aggregata. 

 Gratiola virgin iana. 

 Hookera douglnsii. 



LUliospcrniuiii pilosuni. 

 Lo)natium anihiguum. 

 Loinatiuni grayi. 

 Lupin us hucopliyUus. 

 Lycopus lucidus. 

 Monolcpis nuttalliana. 

 Opul aster paucifiorus. 

 Orthoearpus luteus. 

 Ranunculus glaJ>errinius. 

 Soiecio serra. 

 Silriie nirnziesii. 

 Sol id a go niissourioisis. 

 Steironeiiia ciliatuni. 

 tSi/ntJigris rubra. 

 Tellinia tcnella. 

 Therniopsis niontana. 

 Valeriana ceratophylla. 

 Wyetti ia aniple.rica ulis. 



THE COLUMBIA BASIX ELEMEXT. 



Considering the recent geological origin of the Columbia Basin, 

 the number of species peculiar to it both in the Upper Sonoran and 

 Arid Transition areas is remarkably large. The number Avould be 

 greatly increased by including Oregon forms that do not cross the 

 Columbia River. The Arid Transition species are as follows: 



Allium douglasii. Claytonia diehotoma. 



Amelanehier basalticola. Eriogonuni thymoides. 



Antennaria geyeri. Frasera alhicaulis. 



Antennaria stenophyUa. Helianthella douglasii. 



Arabis cusickii. Loniatiuiu canhyi. 



Artemisia rigida. Lomatiunt cous. 



Boisduvalia glabella. Lomatinm farinosum. 



Custilleja camporum. Lomatinm gormani. 



Castilleja lutescens. Lomatium watsoni. 



Clarkia pulchella. Orthoearpus barbatus. 



