THE BOTANISTS OF PHILADELPHIA. 385 



quantity. Thalictrum coriaceum (Britten) Small, which 

 occurs all through that region, was collected at Blowing 

 Rock, and Thalictrum macrostylum (Shuttle), Small and 

 Heller, at Hickory, in a meadow. Thalictrum polygamum, 

 with which the latter has been associated as a variety, was 

 not seen, and probably does not occur in western North 

 Carolina. Upon returning from the mountains, a few 

 days were again spent at Heilig's Mill, and a trip made to 

 the falls of the Yadkin River, a very picturesque place, 

 and of much botanical interest. Solidago Yadkinensis 

 (Porter) Small and Acer leucoderme Small were obtained on 

 this day. 



The distribution of the plants collected during this and 

 the preceding year brought Mr. Heller to the notice of 

 American botanists, and very unexpectedly in March, 

 1892, came an offer from Rev. George Vasey, Botanist of 

 the Department of Agriculture, to join a botanical expedi- 

 tion then being organized to make explorations in northern 

 Idaho. As the work of the senior class was almost over, 

 permission was readily granted him to take his examinations 

 in advance, and on April 11th he started for Minneapolis, 

 Minnesota, where the party was organized. The party was 

 commissioned for five months, and in that time traveled 

 through some interesting country, from the mouth of 

 the Clearwater River to the north shore of Lake Pend 

 d' Oreille. 



In December of that year he visited New York, and 

 became personally acquainted with Dr. Britton. In Feb- 

 ruary, 1893, he again went to New York, where he spent 

 two or three months, working with Dr. Britton. The col- 

 lecting season was spent in Virginia, principally in the 



