1 f)U 



" 'Write to me, if you think my advice can be of any assis- 

 tance to you. 



" 'Yours truly, 



" 'G. Engklmann. 



" 'P. S. Other plants that interest me considerably are the 

 yuccas. Specimens, notes, ripe fruit and seeds are valuable.' 



"The early spring botanizing about Denver, and among the 

 nearer foothills, yielded quite a number of carices, almost all 

 of which were new to me; and Mr. Stephen T. Olney, of Provi- 

 dence, Rohde Island, being at that time the principal American 

 student of these plants, I addressed to him a request that he 

 examine my specimens of this genus, and report to me their 

 names. It was the beginning of a pleasant correspondence. 



Here is his first letter. 



" '17 Brown St. 



" 'Providence. 

 " 'June nth, 1870. 

 " 'Edward L. Greene, Esq. 

 " 'Denver, Colo. 

 " 'My Dear Sir: 



" 'In reply to yours of 4th inst. I will not only do what you 

 ask in regard to Carex, but shall consider it a great favour into 

 the bargain, as the sight of all collections in this interesting 

 genus is of great advantage to me in the work I am upon, a 

 monograph of North American Carex. 



" ' Dr. Parry and Hall & Harbour got many interesting species 

 in Colorado Territory. Then I have as well Fendler's New 

 Mexican, Sereno Watson's Utah & Nevada, Bolander's &c. 

 Californian Survey, submitted to me for naming. I have also 

 seen a portion of Hayden's collection in Nebraska, many im- 

 perfectly named by good old Dr. Dewey. The Douglas, Drum- 

 mond and other Rocky Mt. Carices I have seen in Torrey's 

 &c. herbaria. 



" 'I should not feel it right to trespass upon your kindness in 

 offering to send me from other genera, but should feel it a favour 

 if you could supply me any plants not in Hall & Harbour or 

 Vasey's collections, at usual "rate of compensation," or perhaps 



