30 



Class II. Gymnospermce. {Seeds naked.) 

 CONIFERiE. The Conk-bearing Family. 



Pixr:?, Touniefort. Pine. 



B:ink>iana, Lainb. Northern Scrub Pine. 



resinosa, Ait. Red Pine. 



Strobus, Linn. White Pine. 

 AniKS, Tournefort. Spruce. 



balsaraea, Marshall. Balsam Fir. 



Canadensis, Michx. Hemlock Spruce. 



nigra, Poir. Black Spruce. 

 Lakix, Tournefort. Larch. 



Americana, Michx. Tamarack. 

 JuNiPEuus, liinmeus. Juniper. 



communis, Linn. 



Virginiana, Linn. Red Cedar. 

 Taxus, Tournefort. Yew. 



baccata, Linn. Ground Hemlock. 



SERIES II. SPORIFER^. 

 (Plants bearing spores, with no true embryos, and no cotyledons.) 



Class I. Angiosporce. (^Spores inclosed.) 



EQUISETACEtE. The Horse-Tail Family. 



Equisetum, Linnaius. Scouring Rush, 

 arvense, Linn, 

 sylvaticum, Linn, 

 limosum, Linn, 

 hyemale, Linn, 

 scirpoides, Michx. 



FILICES. The Ferns. 



PoLYPODiuM, Linnajus. 



vulgare, Linn. 



phegopteris, Linn. 



dryopteris. Linn. 

 Struthiopteris, Wildenow. Ostrich Fern. 



Germauica, Willd. 

 Allosorus, Bernhardi. Rock Brake. 



gracilis, Presl. 



.iiropurpureus, Gray. 

 Ptekis, Linnaius. Brake. 



aquilina, Linn. 

 Adiantum, Linna'us. Maiden-hair. 



pedatum, Linn. 

 Cheilanthes, Swartz. Lip-Fern. 



lanuginosa, Nutt. (C. vestata, Hook.) 

 CoMPTOSORUs, Link. Walking-leaf. 



rhizophyllus, Link. 

 AepLENiUM, Linnjuus, Spleen-wort. 



thrlypteroides, Michx. 



Felix-foemina, R. Br. 

 WooDSiA, R. Brown. 



Ilvensis, H. Br. 

 Cystoptkris, Bernhardi. Bladder-Fern. 



bulbifera, Bernh. 



