CONTRIBUTIONS TO WESTERN BOTANY. 673 



oval-ovate at least, always acute and often acuminate. I 

 have tried in vain to separate the forms into valid species. 

 As a rule the sutures meet near the upper side of the pod 

 by the great intrusion of the dorsal suture, but sometimes 

 they do not quite meet, especially when old, pods often 

 didymous by being deeper sulcate than usual. 



Astragalus lentiginosus var. diphysus (Gray, PI. 

 Fend. 34, 1849. This includes all the purple and large 

 flowered forms of eastern Nevada and Utah to Colorado 

 and New Mexico and south to Arizona having membran- 

 ous to chartaceous pods. 



Astragalus lentigino$us var. McDougali (Sheldon, 

 1. c. 9, 169). This seems to include A. Rothrockti Shel- 

 don, 1. c. 9, 174. This includes all forms with small and 

 coriaceous pods. 



A. LENTIGINOSUS var. cuspiDOCARPUS (Sheldon, 1. c. 

 9, 147). This includes all forms with acuminate, long 

 and coriaceous pods. It is described by Mr. Sheldon as 

 i-celled, but authentic specimens from Leiberg's collec- 

 tion named by Mr. Sheldon are 2-celled. The range of 

 this variety is northward, while the var. McDougali is 

 mostly southward. 



Astragalus lentiginosus var. chartaceus. 



No. 5627m. July 13, 1894, Ephraim, Utah, in clay, 

 6000° alt. 



This plant is very nearly like the type in pubescence, 

 the leaves being rather thick and almost wholly glabrous, 

 from almost obcordate to obovate emarginate ; the pods 

 vary on the same plants in the width of the septum from 

 less than ^-2" wide, but always 2-celled by being deeply 

 sulcate ventrally, the walls are chartaceous, very deli- 

 cately veined externally with parallel veins which throw 

 off many veinlets which connect with each other, the pods 

 are perfectly smooth with a triangular, incurved, short 



