New Species and Relationships in the Genus Coleosporium

A study of the species of the form genus Periderwium occurring on the needles of pines in the United States, and of their relation to the various species of Coleosporium in the same range was begun by the senior writer in 1912. He has since been assisted in this work as follows: by William H. Long in 1914, by N. Rex Hunt from 1915 to I918, and by Glenn G. Hahn in I919 and I920. All collections cited in this paper without the name of the collector were made by the senior writer; where made by others the name of the collector is given. This paper gives some of the results of the more critical sets of inoculations made with