﻿Nelson: New Plants from Wyoming 279 



about 2.5 cm.), the long, gradually-acuminated corolla-lobes, the 



filiformly-attenuated calyx-lobes, the constant inclusion of both 

 style and stamens (the position of the stigma and of the anthers 

 varies between 5 mm. and 10 mm. below the throat of the tube), 

 and the white corolla (tube somewhat marked with pink). 



It may be added that the G. attenuata is hoary or villous- 

 pubescent, especially on the branch lets and calyx ; the inflorescence 

 much denser ; calyx more glandular and the basal leaves green 

 and glabrate. It seems probable that it will be found to belong to 



* 



considerably higher altitudes than G. aggregate*. 



Excellent specimens were secured at Battle Lake, Carbon Co., 

 at an altitude of about 10000 feet, Aug. 16, 1897, no. 4189. 



Pentstemox collixus. 



Cespitose, the rootstocks much branched and closely matted ; 

 stems numerous, unbranched, erect, often wavy rather than strict, 

 2-3 dm. high, puberulent their whole length, glandular upward ; 

 root leaves numerous, entire, clustered on the crowns of the root- 

 stocks, a dull or dead green, glabrous but scarcely smooth, midrib 

 prominent on the lower face, petioles slender, about equalling the 

 blade, blade elliptic-oblong, acute at both ends, 2-3 cm. long ; stem 

 leaves sessile or tapering into a marginal petiole, narrow-oblong or 

 spatulate, 2-4 cm. long ; upper leaves shorter, lanceolate-linear, 

 passing into the shorter lanceolate bracts ; thyrsus strict, inter- 

 rupted, 5-9 cm. long, the whole inflorescence minutely glandular- 

 puberulent; peduncles 3— 5 -flowered, the flowers crowded; sepals 

 broadly lanceolate, scarious margined, loosely spreading, one-third 

 as long as the corolla ; corolla deep blue, slender-tubular, but 

 slightly inflated upwards, the lobes short, spreading, sparsely hairy 

 m the throat ; sterile filament comose on the flattened apex ; an- 

 thers dehiscent through the junction of the two cells, not ex- 

 planate. 



Its general aspect and floral characters suggest P. liumilus 

 Nutt but it may be distinguished by its more caespitose habit, its 

 more compact root system, its rosulate, pointed root leaves, its 

 smaller, more tubular corolla with shorter lobes, the erect, wavy, 

 puberulent stems and more rigid and paler leaves. 



Its habitat seems to be the dry, gravelly hilltops in the foot- 

 s. Type specimen in Herb. University of Wyoming, no. 



hill 



2 96o, ! anston, May 28, 1897 



