68 



PHBGOPTERIS 



alpestris, Mett. 

 calcarea, Fee. 

 Dryopteris, Fee. 

 hexagonoptera, Fee. 

 polypodioides, Fee. 



POLYPODIUM 



falcatum, Kellogg. 

 Scouleri, H. & G. 

 vulgare, L. 



PTERIS 



aquilina, L. 



var. lanuginosa, Bong. 



SCHIZJBA 

 pusilla, Pursh. 



SCOLOPENDRIUM 



vulgare, Smith. 



var. marginatum, Moore. 

 var. ramosum, Gray. 



WOODSIA 



glabella, R. Br. 

 hyperborea, R. Br. 

 Ilvensis, R. Br. 

 obtusa, Torr. 

 Oregana, Eaton, 

 scopulina, Eaton. 



WOODWARDIA 



Virginica, Smith. 



MARSILIACE/E. 



MARSILIA 



vestita, H. & G. 



SALVINIACE/E. 



AZOLLA 



Caroliniana, Willd. 



LYGOPODIACE/E. 



LYCOPODIUM 



alpinum, L. 

 annotinum, L. 



var. pungens, Desv. 

 clavatum, L. 

 complanatum, L. 

 dendroideum, Michx. 

 inundatum, L. 



var. Bigelovii, Tuck, 

 lucidulum, Michx. 

 sabinaefolium, Willd. 

 Selago, L. 



SELAGINELLACE/E. 



SELAGINELLA 



apus, Spring, 

 rupestris, Spring, 

 selaginoides, Link. 



ISOETAOE/E. 



ISOETES 



echinospora, Durieu, var. 



Braunii, Engelm. 

 lacustris, L. 

 maritima, Underwood. 

 Nuttallii, A. Br. 

 riparia, Engelm. 



