No. 17.] 

 Beard Grass. 



Indian Grass. 



AGRICULTURAL COLLEGE. } 27 



Andropogon furcatus, Mulil. 



Ames. 



Andropogon scoparius, Miclix. 



Ames. 



Sorghum nutans, Gray. 



Ames. 

 Common on the prairies. 



Common Horsetail. 



Scouring Rush. 



Polypody. 

 Maidenhair Fern. 



Spleenwort. 

 Walking Fern. 



Bladder Fern. 



Sensitive Fern. 

 Moonwort. < 



EQUISETACE^E. 



Equisetum arvense, L. 



Ames ; Charles City. 

 At Ames, also, the " accidental state"— var. serotinum, Myer. 

 — "in which the sterile plant produces a spike of fruit from 

 its summit." 



Equisetum palustre, L.(?) 



Ames. 

 Annual stemmed ; main stems 12-14 grooved, and branches 

 6-9 grooved ! 



Equisetum byemale, L. 



Ames. 



FILICES. 



Poly podium vulgare, L. 



Ames (on Des Moines River bluffs.) 



Adiantum pedatum, L. 



Ames ; Charles City. 



Asplenium tbelypteroides, Miclix. 

 Ames. 



Camptosorus rbizopbyllus, Link. 



Ames (on Des Moines River bluffs.) 



Cystopteris fragilis, Bernb. 



Ames. 



Onoclea sensibilis, L. 



Ames. 



Botrycbium, Yirginicum, Swartz. 

 Ames. 



Note. — As tbe preceding catalogue is as yet very imperfect, 

 persons noting omissions or errors will confer a favor by correspond- 

 ing witb C. E. Bessey, Ames, Iowa. 



