30 New or rare Plants from the Rocky Mountains. 



Descriptions of some new or rare Plants from the Rocky 



Mountains, collected in July, 1820, by Dr. Edwin James. 



By John Torrey, M. D. Read before the Lyceum, 



Sept. 22, 1823. 



Among the many valuable discoveries in Natural History, 

 made by the scientific gentlemen attached to the late expedi- 

 tion to the Rocky Mountains, commanded by Major Long, 

 those relating to the department of Botany are not the least 

 interesting. Dr. Edwin James, who was the botanist in this 

 hazardous journey, and whose zeal in prosecuting his favour- 

 ite science is so well known, having been called to accompany 

 another expedition, from which it is uncertain when he will 

 return, has kindly permitted me to commence the publication 

 of the discoveries he made; particularly of the plants from 

 the summit of the Rocky Mountains, as well as the whole of 

 the Gramina. Owing to my having but part of Dr. James's 

 collection in my possession, it is impossible to preserve much 

 order in the arrangement of the plants I shall describe ; they 

 will therefore be published in occasional Decades, as I find 

 leisure to determine them. 



1. Androsace carinata.* Tab. III. f. 1. 

 A. foliis congestis ovato-lanceolatis acutis integerimis ca- 



rinatis, margine ciliatis, umbella pauciflora, foliolis involu- 



cri lineari-oblongis, corolla calycem ovatum excedente, laci- 



niis obovatis integerimis. 



Description. 



Root perennial. Leaves crowded into a roundish bulb about 

 the root, somewhat spreading, thick and rather coriaceous, 

 scabrous, carinate beneath by the prominent midrib ; mar- 

 gin fringed with hairs. Scape from one half to three quarters 

 of an inch in height, villose, slender, five-flowered. Calyx 

 short-ovate villous ; segments oblong, obtuse, very entire. 

 Corolla white, as large as in A. villosa ; tube about as long 

 as the calyx, ovate ; segments obovate, entire ^ throat nearly 



