﻿New Plants from Wyoming.— I. 



By A yen Nelson. 



(Plate 341.) 



In my work in the Red Desert of Wyoming during part of the 

 season of 1897 a number of rather unusual and interesting plant 

 forms were secured and some plant ranges were greatly extended. 

 To me one of the most interesting finds was a perfectly yellow 

 flowered Oreocarya, which may be described as follows : 



Oreocarya flava. 



Perennial, tufted from a branched, lignescent caudex, 1—2.5 

 dm. high : stems numerous, simple, white pubescent below, ful- 

 vously hirsute upwards : leaves numerous, basal ones scale-like 

 and densely white hirsute, lower stem leaves somewhat crowded, 

 linear to narowly oblanceolate-petiolate, appressed pubescent or 

 hirtellous, upper leaves slightly broader with broader base, 3-5 

 cm. long : inflorescence crowded, glomerate spicate ; calyx yel- 

 low-hirsute, lobes linear, half the length of the corolla-tube ; 

 corolla a decided yellow, tube about 1 2 mm. long, lobes suborbic- 

 ular, 3—4 mm. in diameter, crests conspicuous, emarginate ; essential 

 organs strikingly dimorphic ; stamens inserted just below the throat 

 or just below the middle of the tube, anthers linear ; style the 

 length of the tube or half the length ; mature nutlets not seen but 

 seemingly smooth, ovate, one or more sometimes smaller and 

 possibly not maturing. 



A remarkably distinct species, not comparable to any form 

 known to the writer. Krynitzkia leucophaea Gray may be sug- 

 gested by it but from that it is more than distinct. In the pos- 

 session of decidedly yellow flowers it probably stands alone. A 

 beautiful and striking plant as observed on the otherwise often 

 naked hillsides in the Red Desert. Two collections were secured 

 June 1, 1897, one at Point of Rocks, the other at Bitter Creek 

 Station. These differ in that all the specimens in one have long 

 stamens, and in the other they are all short. 



Type specimen in Herb. Univ. of Wyoming, no. 3074- 



In recent years there has been much seeking after plants that 



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