55 



RARE WYOMING PLANTS. 



Peucedanum Nevadensis Watson. Evanston (3,086). 



Peucedanum macrocarpum Nutt. Point of Rocks (3,016). 



LEPTOTiENiA multifida Nutt. Evanston (2,982). 



The three preceding, I believe, have their range considerably 

 extended by the localities noted above. 



Valeriana Sitchensis Bong. A plant that is not rare in 

 sub-alpine meadows; Battle Lake (4,203). 



Chrysothamnus collinus Greene. Point of Rocks (4,435). 

 Chrysothamnus linifolius Greene. Granger and Point of 



Rocks (4 440) 



The two preceding are both common, the former on the dry 

 sandy hills of the Red Desert, and the latter on the wet banks ot 

 all the saline creeks of the region. The above numbers are from 

 near type localities. 



Chrysothamnus Parryi (Gray) Greene. 

 Chrysothamnus Vaseyi (Gray) Greene. 



The last two are just as common in the sub-alpine parks of 

 southern Wyoming as they are in Colorado. 



Xylorrhiza Parryi (Gray) Greene. Red Desert station 

 (3,123). 



Xylorrhiza villosa Nutt. Laramie Plains (3,167). 

 These handsome Asteraceous plants are characteristic of the 

 strongly alkaline slopes and ridges of southern Wyoming. 



Tetraneuris (Actinella) Torreyana (Nutt.) Greene, Pitt 

 III 265 This excellent species covers all the rocky points and 

 slopes in the Laramie Hills, where it comes into blossom early in 

 May and disappears by the middle of June. 



Tetraneuris lanata (Nutt.) Greene. 1. c. An inhabitant of 

 the white hilltops in the Green River bluffs (3,068). This species, 

 as well as the preceding, has practically been suppressed for some 

 years, but no one can doubt the validity of either who sees the 

 authentic specimens secured the past season. 



Among the Senecios the following may be mentioned as rare and 

 seldom, if ever before, reported from this state: Senecio Bigelovn 

 Gray, and S. petraeus Klatt. 



