Parasitic Fungi of Illinois

Most of the plants herein described were collected in Illinois during 1881 and 1882. by Mr. A. B. Seymour, who was employed for the purpose by the Illinois State Laboratory of Natural History. The entire collection consists of three thousand seven hundred and eighty-four numbers, many of which are of course duplicates, or are different stages of the same species, leaving, however, a very large number of distinct specific forms—much larger than is usually supposed to exist in our flora. The determinations have been made at the Illinois Industrial University by myself, efficiently aided by Mr. Seymour. For this work, besides the facilities offered by the library and herbarium of the University, the State Laboratory of Natural History furnished many books and specimens. Among the latter are the following sets of exsiccata: DeThumen's Mycotheca Universalis, Ellis' North American Fungi. Ravenel's Fungi Caroliniani and Fungi Americani.