52 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Polygonum greenei. 

 Polygonum parryi. 

 Ptilocalaix nutana. 

 Ptilonella scahra. 

 l!<cnbneria holaiHlcri. 

 Scutellaria angustifplia. 

 Sidahea on^gaiia. 

 Trichostema oblongtnu. 



Trifolium ciliolatuui. 

 Tri folium cyath iferum. 

 Vriica holosericca. 

 ValcrianeUa tnacrocera. 

 Vcratrum californirum. 

 Wycthia aiiguslifolia. 

 Zygadenus vcnenosus. 



THE ROCKY MOUNTAIN ELEMENT. 



This consists of species Avhich 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 

 origin. Among them are the following: 



Adenostegia capiiata. 

 Agosoris glauca. 

 Antcvnaria dimorpha. 

 Arabis holboelii. 

 Artemisia dracuiiculoides. 

 Cercocurpus ledifolius. 

 Com us stolon if era. 

 Disporum maju^. 

 Erigeron corymbosus, 

 Eriogonum datum. 

 Eriogouum heracleofdes. 

 Frasera speciosa. 

 Fritillaria pudica. 

 Gaillardia aristata. 

 Galimn aspcrrimum. 

 Gilia aggregata. 

 Gratiola virginiana. 

 Hookera douglQsii. 



LUliospcrmum pilosum. 

 Lomaiium am bigu um. 

 Lomatium gruyi. 

 Lupinus Irucophyllus. 

 Lyropuft lucidus. 

 Mouolrpis nuttalliana. 

 Opuhistcr pa ucifiorus. 

 Orthocarpus luteus. 

 Ranunculus glaberrimus. 

 Senecio scrra. 

 Silcne mcnziesii. 

 Sol id a go m isso urlensis. 

 Strironrtna ciliatum. 

 Synthyris rubra. 

 Tellima tcnclhi. . 

 Thcrmopsis niontana. 

 Valeriana ceratophylla. 

 Wyethia amplexicaulis. 



THE COLUMBIA BASIN ELEMENT. 



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 would be 

 greatly increased by including Oregon forms that do not cross the 

 Columbia River. The Arid Transition species are as follows: 



Allium donglasii. 

 Amelanchier basalticola. 

 Antennaria geyeri. 

 Antennaria stenophylla. 

 Arabis cusickii. 

 Artem,isia rigida. 

 Boisduvalia glabella. 

 Castilleja camporum. 

 Castilleja lutescens. 

 Clarkia pul<;hella. 



Claytonia dichotoma. 

 Eriogonum thymoides. 

 Frasera albicaulis. 

 Helianthella douglasii. 

 Lomatium canbyi. 

 Lomatium cons. 

 Lomatium farinosum. 

 Lomatium, gormani. 

 Lomatium ivatsoni. 

 Orthocarpus barbatus. 



