466 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



POLEMONIXJM. 



, . . 1. P. micranthum. 



Annual; corolla white, nearly rotate 



Perennials; corolla blue, campanulate. 



Stems er^ct, 60 to 90 cm. tall. ^ ^ coeruUum. 



Leaflets oblong-ovate... z. P. r^dvmtum. 



Leaflets linear 



Stems low, 5 to 30 cm. high. 



Densely cespitose, o to 10 cm. high. 



Viscid-glandular throughout; flowers violet with 



yellow eve " 



Less viscid, spareelv pilose throughout; flowers 



white or pale blue i " j ' i' " " 



Loosely cespitose, 15 to 30 cm. high, scarcely glandular. 



Leaflet, oval or oblong, less than 1 cm. long b. i . hum^. 



Leaflet. lanc«olat«, 1 to 1.5 cm. long 7. P. amoenum. 



1 Polemonium micranthum Henth. in DC. Prod 0: 318. 1845. 

 'tyi-k uxvuty- "Ad flum. Columbia." Collected by Douglas. 

 IUsuk: British ^^'^^^^^^^^^^ Yakima, Ilen^rson, May 25, 



H«// 589; Wawawai, Pi/>er 1521; Walla \N^\\f.Brandegee 972. 

 Zonal DiffmiBUTioN : Arid Transition and Upper Sonoran. 



2 Polemonium coenileum L. Sp. PI. 1 : 162. 1753. 

 '/^Ttaltrre ulrgrouna ^^U preserved to iudge this character t.,riy. 



^.r=r^.trrerr.^rwafHt^-^^^^^^ 



Susan TucTcer in 1892; eastern Washington, E^ard in 1882, without locality, 



Ex'pedition. 



4 Polemonium elegans Greene, Pittonia 3: 305. 1898 (April 8) 



Collected by Piper. 



Adams, Sulcsdcrf 79; HoweU in 1882; Henderson 2411; Flett 1243. 

 Zk>NAL distribution: Arctic. 



