38 Flora of Rensselaer County, N. Y. 



EQUISETACE^E. 



Equisetum arvense, L. 

 sylvaticum, L. 

 limusum, L. 



hyemale, L. Scouring-rusii. 

 variegatuni, Schl. 

 seirpoides, Mx. 



FILICES. 



Poly podium vulgare, L. Rock-polypod. 

 Adiantum pedatum, L. 

 Pteris aquilina, L. 

 Pelhca atropurpurea, Lk. 



Woodwardia Yirginiea, Smith. Gary's swamp, (middle reser- 

 voir) Howe, 1S62. Rare. 

 Asplenium Triebonianes, L 



ebencum, Ait. 



var. incisum, Howe. Regents' 22c! An. Rep. — Poestenkill, 

 E. C. H. Rare. 



tbelypteroides, Mx. 



Filix-foemina, Bernh. 

 Camptosorus, rhizophyllus, Lk. 

 Pbegopteris poly pod ioides, Fee. 



hexagonoptera, Fee 



Dryopteris, Fee 

 Aspidium Thelypteris, Swz. 



IVovaeboracense, Swz. 



spinulosuni, Swz. 



var. intermedium, Eaton.. 



cristatum, Swz. 



marginal^, Swz. 



acrostichoides, Swz. 



var. incisum, Eaton. 

 Cystopteris bulbifera, Bernh. 



fragilis, Bernh. 

 Onoclea sensibilis, L. 



forma obtusifolia. Sandlake, Howe. 



Struthiopteris, Hoffm. 

 Woodsia Ilvensis, R. Br. 



obtusa, Torr. 

 Dicksonia pilosiuscula, Willd 

 Osmunda regalis, L. 



Claytoniana, L. 



cinnamomea, E. 



OPHIOGLOSSACE^E. 



Botrychium simplex, Hitch. Petersburg, Dr. Gordinier. Very 



rare. • 



