During the Spring of 1948 the author found, growing abundantly at Hopemont, West Virginia, a species of Hieracium which was typical of neither Hieracium pratense Tausch nor Hieracium floribundum Wimm. and Grab. but possessing traits of both these species. This led to a study of the West Virginia species of this genus and after completing the study it still remains the most perplexing problem encountered in the work.