PAPERS OX BIOLOGY AND AGRICULTURE 



165 



COXTRIBUTIOX TO THE FLOEA OF CASS 

 COUNTY, ILLINOIS. 



Fraxk C. Gates, Manhattan , Kansas 



From July 4 to 15, 1905, the author had the oppor- 

 tunity to visit at Virginia, Cass Co., Illinois. During the 

 visit he was able to make several trips in the vicinity, 

 collecting a number of plants and making lists of the 

 species in various areas. It was plamied to use this data 

 in connection with some work on the Illinois Flora, but 

 it seems ad\'isable to publish the list now so that it -will 

 be available for use. Ob^dously this list of 393 species 

 is incomplete on account of the limited time at the auth- 

 or's disposal. 



Virginia is located at the junction of the B. & 0. S. "W. 

 and C. P. «S: St. L. railroads in the south central part of 

 Cass County, some 15 or so miles from the Illinois Eiver. 

 The country around Virginia is upland, with a few 

 streams rising and for the most part flowing towards 

 the Illinois River. 



The accompanying sketch map indicates the area visi- 

 ted, the numbers corresponding to those expressed in the 

 accompanying list of plants. Britton and Brown's * 'Il- 

 lustrated Flora", 2nd edition, is followed rather closely 

 in the naming of the plants, except in the grasses where 

 Hitchcock's "Genera of Grasses" is used. The names 

 and the arrangement of families agree with that of the 

 natural system as exemplified by Bessey. 



The specimens collected are now to be found in the 

 herbaria of the University of Michigan, the Field Mu- 

 seum of Natural History, and the University of Illinois. 



list of plants of CASS COUNTY, ILLINOIS 



Phylum— PTER I DOPH YT A . 

 Fam. Polypodiaceae. 

 Onoclea sensibilis L.. 1, 3. 7, 10. 

 Filis fragiUs (L.) L'nderw., 10. 

 Asplenium sp., 7. 

 Adiantum pedatum L., 7. 

 Pteris aquilina L., 9. 



Phylum— CALAMOPHYTA. 

 Fam. Equisetaceae. 

 Equisetum arvense L., 2, 6, 8, 9. 

 Equisetum hyemale L., 2. 



Equisetum pratense Ehrh.. 2. 

 Equisetum laevigatum A. Br., 2, 9. 



Phylum— STROBILOPHYTA. 



Thuja occidentalis L.. Cultivated in 5. 

 Juniperus virginiana L., 5. 



Phylum— ANTHOPHYTA. 

 Class MONOCOTYLEDONEAE. 

 Fam. Alismataceae. 

 Alisma subcordatum Raf., 5, 6. 

 Sagittaria latifolia Willd., 5. 



