Species of Sclerotinia from Grand Mesa National Forest, Colorado

This paper consists of some of the results of a collecting trip made by the senior author to the Grand Mesa National Forest, Colorado, during the period of June 12 to July 20, 1930. Al? though the fungi here discussed represent only a small percentage of the total number of collections, it seems that the species of Sclerotinia were sufficient in number and interest to justify a separate account. The Grand Mesa National Forest is on the western slope of the Continental Divide in the west-central part of Colorado, and Grand Mesa Mountain, where most of the species of Sclerotinia were obtained, has sufricient moisture from melting snow and summer rains to make possible a rich fungus flora. Most of the fungi were found near the top of the mountain, at an elevation of about 10,000 feet; Sclerotinia gregaria, however, occurred approximately 2,000 feet lower, several miles down the mountain from Mesa Lakes.