﻿Nelson: New Plants from Wyoming.— IV 547 



Green River, May 30, 1897, but I have this year observed it in 

 many other localities. 



Gilia Grayi. 



spitosa 



1876. 



"pit os a 



by some other name it may stand as above. 



* 



Pentstemon Jamesii Benth., DC. Prod. 10 : 325, possibly only 



in part ; A. Gray, Proc. Am. Acad. 6 : 67, in part only. 



P. albidus Nutt, Torr. in Ann. Lye. N. Y. 2 : 229, in part. 



Concerning this plant there has arisen some confusion owing 

 to the fact that it has rarely been collected while a somewhat sim- 

 ilar plant early found its way into the herbaria under this name. 

 As a result, not only are the specimens in the herbaria misleading, 

 but the later descriptions, having been drawn to cover both plants, 

 are more nearly applicable to the more frequently collected one. 



In regard to P. Jamesii the facts seem to be about as follows : 

 In 1820, James collected some plants in Colorado or Wyoming 

 which Torrey, in 1828 (Ann. Lye. N. Y. 2: 229), referred to 

 P. albidus Nutt. In 1846 (?) Bentham separated these, and pos- 

 sibly others somewhat similar, from the true P. albidus under the 

 name P. Jamesii (DC. Prod. 10: 325). In 1862, Gray rede- 

 scribed the species (Proc. Am. Acad. 6 : 67). In the meantime 

 several collections of a more southern plant had been made, 

 notably by Fendler, whose nos. 575 and 579 Gray cites in particu- 

 lar as typical of the species. Recent collections of the true P. 

 Jamesii by Dr. P. A. Rydberg in S. Dakota in 1892, and by the 

 writer in the Red Desert of Wyoming in 1897 (no. 3052) and 

 again in 1898 (no. 4716) show that this plant is very different from 

 the more southern one. 



Before I began work upon these collections Dr. Rydberg had 

 satisfied himself that his Dakota plant closely duplicated the type 

 of P. Jamesii which is preserved in the Torrey Herbarium at Co- 

 lumbia University, and with which he has done me the favor of 

 comparing my specimens also. 



To set this matter straight then, it seems well to redescribe 

 the species from the excellent and abundant material now at hand : 



