﻿Nelson : New Plants from Wyoming 377 



the flowers : achenes striate, flattened-clavate, glabrous, when 

 mature 6 mm. long ; pappus scanty, about equaling the achene. 



It is abundant in a few localities on the Laramie Plains, inhabit- 

 ing gravelly-clay soil of some ridges and flats. . Last collection of 



it and type of the variety, no. 3459. 



Chrysothamnus glaucus. 



A slender, sparingly branched shrub, .5-1 m. high ; the older 

 branches naked, gray with a shreddy bark ; the season's twigs 

 somewhat fastigiate, leafy, glabrous with whitish shiny bark : 

 leaves suberect, narrowly lanceolate, acute, obscurely 3 -nerved, 

 2.5-4 crr *. long, usually once or twice twisted half way round, 

 glaucous, i. e. f varying from whitish to a bluish green hue with an 

 ill-defined sheen, margins obscurely scabro-ciliate : heads nu- 

 merous, in short, compact, terminal, rounded cymose corymbs, 

 about 8 mm. high, bracts subcarinate, 5 -ranked, 3-4 in each rank, 

 lanceolate, acute, the outer greenish, the inner thin, membranous, 

 all erect or somewhat loose in age, glabrous as is the whole inflor- 



escence except for a minute pubescence on the pedicels : corollas 

 4 (seemingly invariably so), lobes linear-lanceolate, about half the 

 length of the tube : style tips linear-subulate, tardily exserted : 

 achenes silky, short-linear or slightly enlarged upward, half as 

 Jong as the rather rigid abundant pappus. 



Not readily referred for comparison to any of the existing species 

 but having a few of the characters of both C. clegans Greene and 

 £ inscidiflorus lanceolatus (Nutt.) Greene, from both of which it is 

 too distinct to allow of serious comparison.* 



Seemingly very rare ; on dry slopes in the foothills of the Medi- 

 cine Bow mountains, Chimney Rock, Aug. 8, 1896, no. 2054. 



Soli dago concinxa. 



densely tufted from branching, horizontal, or ascending root- 

 st ocks, bright green and glabrous throughout, 15-25 cm. high; 



tems numerous, simple except as to the floriferous summits, 

 densely leafy up to and including the basal part of the glomerate 

 '"florescence : root-leaves narrowly oblanceolate, tapering very 



;radually and margined the whole length of the slender base, 8- 

 l S cm. long; stem leaves narrowly oblong or oblanceolate, dimin- 

 ,Sn «ng in size upward, those of the inflorescence becoming small 

 ' md line ar ; all the leaves obscurely scabro-ciliate on the margins. 



Dr. Rydberg, who has kindly made comparison of the plants published in tins 

 j "^ P a P er ' informs me that Bigelovia Douglasii ciliata of Palmer's collection of 1896 

 e saine > but there seems to be no description of it. 



