Additions to Lichen Distribution in the Mississippi Valley

During the last few years I have examined a large number of lichens from various parts of the Mississippi Valley, and a few of these have never been recorded from the states in which they were collected, either in my own papers, or, so far as I know, in other publications. In a paper read before the botanical section of the A.A.A.S. at the Columbus meeting I made mention of some of these plants, but several are of special interest because rare or difficult to detect, and I have thought it worthwhile to record all for distribution. Aside from a single collection by myself in Illinois, the collectors are L. H. Pammel, E. Bartholomew, C. J. Herrick, C. H. Demetrio and R. Dunlevy. The collection made by Professor Pammel at La Crosse, Wis., is of special interest because it contains an unusually large number of interesting lichens for a small collection. With the exception of the single specimen from Illinois, the plants are all recorded from states whose lichen flora are little known; hence the record is the more needed