No. 17.] 



AGRICULTURAL COLLEGE. 



127 



Beard Grass. 



Indian Grass. 



Andropogon furcatus, Muhl. 

 Ames. 



Andropogon scoparius, Michx. 



Ames. 



Sorghum nutans, Gray. 



Ames. 

 Common on the prairies. 



EQUISETACE.E. 



Common Horsetail. 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 13-14 grooved, and branches 

 6-9 grooved ! 



Equisetum hyemale, L. 

 Ames. 



Scouring Rush. 



FILICES. 



Poly podium vulgare, L. 



Ames (on Des Moines River bluffs.) 

 Maidenhair Fern. M]mtam pedatum) L . 



Ames ; Charles City. 



Asplenium thelypteroides, Michx. 



Ames. 



Camptosorus rhizophyllus, Link. 



Ames (on Des Moines River bluffs.) 



Cystopteris fragilis, Bernh. 



Ames. 



Onoclea sensibilis, L. 



Ames. 



Botrychiuin, Yirginicum, Swartz. 

 Ames. 



Polypody. 



Spleenwort. 

 Walking Fern 



Bladder Fern. 



Sensitive Fern 

 Moonwort. : 



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

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

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



