THE FERN BULLETIN 



35 



whose hands the list may fall. Many additions to the 

 number of species can hardly be expected. Doubtless 

 the state has been quite well explored in this respect. 

 I find only two to add to those published by Patterson 

 in 1876, Isoetes Butleri, described in 1878 from speci- 

 mens found in Indian Territory (Oklahoma) but 

 since found in this state, and Equisetum Ferrissii, a re- 

 cent addition. The list is mainly a compilation made 

 at the request of the editor of the Fern Bulletin. No 

 special fitness for the task is claimed, since my personal 

 knowledge of the region covered is almost wholly con- 

 fined to five of the northeastern counties, Kankakee, 

 Will, Cook, Dupage and Lake. Only casual trips of 

 slight duration have been made to other places. The 

 publication most relied on for the state at large is the 

 "Catalogue of the Phaenogamous and vascular crypto- 

 gamous plants of Illinois," H. N. Patterson, Oquauka, 

 111., 1876. His catalogue of plants growing in the im- 

 mediate vicinity of Oquauka has also been used. Fried- 

 rich Brendel's "Flora Peoriana, Budapest, 1882," (the 

 German edition, but since given in English, I believe) 

 has furnished some definite information for a district 

 around the city of Peoria. The floras of H. H. Bab- 

 cock and of Higley and Raddin for Chicago and vi- 

 cinity have likewise been consulted, but as they respect 

 territory mainly familiar to the writer, could be cited 

 but little. 



As explantory of the plan followed I may state that 

 I have first mentioned the localities or stations with 

 which I am personally acquainted, and from which 

 examples are in my herbarium unless very common 

 throughout. Citations from Patterson's catalogue for 

 the state at large are entered in quotation marks fol- 

 lowed by (P.)- Where Peoria is given the authority 

 is Brendel, where Oquauka, Patterson. A few have 



