417 



Sorghum, Pers. 



nutans. Andropogon nutans, Linn. 



EQUISETACE^. The Horse-Tail Family. 



Equisetum, Linn. Horse-Tail. 

 arvense, Linn. 



eburnura, Sclireb. Lake Superior, Dr. Torrey. 

 sylvaticum, Linn, 

 limosum, Linn. 



hyemale, Linn. Scouring Rush, 

 laevigatura, Braun. 

 variegatum, Schleicher, 

 scirpoides, Michx. 



FILICES. The Fern Family. 



PoLYPODiuM, Linn. 



vulgare, Linn. Blue Mounds, I. A. Lapham. 

 phegopteris, Linn. St. Croix, Dr. Parry, 

 dryopteris, Linn. Dells of the Wisconsin. 



Struthiopteris, Willd. Ostrich Fern. 

 Germanica, Willd. 



Allosorus, Bernhardi. 



gracilis, Presl. Dells of the Wisconsin. 



ASPIDIUM. 



fragrens, Sw. Falls of the St. Croix, Dr. Parry. 



Adiantum, Linn. Maiden Hair, 

 pedatum, Linn. 



Pteris, Linn. Brake. 



aquilina, Linn, 

 atropurpurea, Linn. 



Cheilantiies, Swartz. Lip Fern. ^ 



vestita, Willd. Falls of St. Croix, Dr. Parry. 



Camptosorus, Link. Asplenum, Linn, 

 rhizophyllus. Link. Walking Leaf. 



AsPLENiuM, Linn. Spleenwort. 



trichomanes, Linn. Dells of the Wisconsin. 



thelypteroides, Michx. 



Filix-femina, R. Brown. Aspidium asplenoides. 



Cystopteris, Bernhardi. Bladder Fern, 

 bulbifera, Bernh. 



