64 



[Senate 



EQUISETACE^. 



Equisetum arvense, Linn. 



— sylvaticum, Linn. 



— limosum, Linn. 



— hyemale, Linn. 



— variegatum, Schick. 



— scirpoides, Michx. 



F1LICES. 



Polypodium vulgare, Linn. 



— hexagonopterum, Michx. 



— phegopteris, Linn. 



— dryopteris, Linn. 

 Struthiopteris germanica, Willd. 

 Allosorus gracilis, Presl. 

 Pteris aquilina, Linn. 

 Platyloma atropurpurea, /. Sm. 

 Adiantum pedatum, Linn. 

 Doodia virginica, Presl. 

 Woodwardia angustifolia, Smith. 

 Scolopendrium officinarum, Smith. 

 Asplenium trichomanes, Linn. 



— ebeneum, Ait. 



— angustifolium, Michx. 



— ruta-muraria, Linn. 



— thelypterioides, Michx. 



— filix-foemina, R. Br. 

 Antigramma rhizophylla, I. Sm. 

 Aspidium marginale, Swartz. 



— goldianum, Hook. 



— cristatum, Swartz. 



— dilatatum, Swartz. 



— thelypteris, Swartz. 



— noveboracerwe, Willd. 



— acrostichoides, Swartz. 



Onoclea sensibilis, Linn. 

 Woodsia ilvensis, R. Br. 



— obtusa, Torr. 



* — glabella, R. Br. 

 Cystopteris bulbifera, Bernk. 



— fragilis, Bernh. 

 Dicksonia pilosiuscula, Willd. 

 Osmunda claytoniana, Linn. 



— cinnamomea, Linn. 



— spectabilis, Willd. 

 Lygodium palmatum, Sw. 

 Ophioglossum vulgatum, Linn. 

 Botrychium virginicum, Sioartz. 



— lunarioides, Swartz. 



— simplex, Hitchcock. 



LYCOPODIACE^. 



Lycopodium selago. 



— lucidulum, Michx. 



— inundatum, Linn. 



var. alopecuroides, Tucherm. 



— annotinum, Linn. 



— obscurum, Linn. 



— clavatum, Linn. 



— complanatum, Linn. 

 Selaginella rupestris, Spring. 



— apus, Spring. 



SALVINACE^E. 



tSalvinia natans, Willd. 

 Azolla caroliniana, Willd. 



ISOETACEJi. 



Isoetes lacustris, Linn. 



