100 Ohio Naturalist. [Vol. 1, No. 6 



about twenty rods from the old patch. The soil is mainly clay with 

 some loam, and has been cultivated and fairly well manured for 

 many years. The ground slopes to the west and is well drained, 

 though the lower jjortion is perhaps somewhat inclined to be moist. 

 The plants made an excellent growth. The infection throughout 

 was general, quite a large percentage of the stalks at this season 

 being very black from base to tip with the almost contiguous sori or 

 blotches of Rust. Why these thrifty young plants should be so 

 thoroughly infected, as compared with the older ones but a short 

 distance away which have for several years harbored the Rust, 

 though rather sparingly, is not clear to the observer. 



A LIST OF KANSAS DESMIDS. 

 John H. Schaffner. 



A few years ago Prof. Lorenzo N. Johnson, of the University of 

 Michigan, was at work on a monograph of the Desmids of North 

 America, intending to make a comprehensive study of the American 

 species; but his untimely death in the early part of the year 1897, 

 prevented the fulfillment of this purpose. Some material which 

 Prof. Johnson liad received from Kansas proved very rich in species. 



Thinking that a list of the determined Kansas species would 

 make a valuable addition to the Kansas flora, I have obtained the 

 following list of forty-seven species which was kindly furnished by 

 Mrs. Johnson, of Evanston, 111. I have verified the names, and 

 arranged the genera in the order followed in Engler and Prantl. 

 Very few localities were given in the card catalogue from which the 

 list was taken, and only a few others could be added which were 

 •taken from Prof. Johnson's published articles. 



Family Desmidiaoeae. 

 Pbnium (Breb.) DeB. 



1. P. margaritaceum (Ehrb.) Breb. 



Clostebium Nitzsch. 



2. C. acerosum (Schrank) Ehrb. 



3. C. areolatum Wood. 



4. C. didymotocuin Corda. 

 B. C. lanceolatum Ktz. 



6. C. leibleinii Ktz. 



7. C. lineatum Ehrb. 



8. C. lunula (Muell.) Nitzsch., Topeka. 



9. C. macilentum Breb. 



10. C rostratum Ehrb. 



11. C. setaceum Ehrb. 



12. C. tumidium Johnson, Burlington. 



Pleubotaenium (Naeg.) Lund. 



13. P. nodulosum (Breb.) DeB. 



14. C. trabecula (Ehrb.) Naeg. 



