56 CATALOGUE OF PLANTS. 



SERIES 2. 



CRYPTOGAMOUS OR FLOWERLESS PLANTS. 



Class III. ACROGENS. 



Order 97. EQUISETACE^. Horsetail Family. 



Eqilisetum, L. Horsetail. Scouring Rush. 



E. arvense, L. (Common Horsetail.) Moist, especially gravelly soil ; very 



common. 

 E. sylvaticum, L. (Wood Horsetail.) Wet shady places ; common. 

 E. limosum, L. (Marsh Horsetail.) In shallow water ; common. 

 E. hyemale, L. (Scouring Rush.) Wet, sandy banks ; very common. 

 E. variegatum, Schl. Sandy banks of rivers. Hanover, N. H. ; Hartford, 



Pomfret, and Union Village, Vt. ; rare. 

 E. scirpoides, Michx. Wooded hillsides ; common. 



Order 98. FILICES. Ferns. 



Polypodium, L. Polypody. 



P. vulgare, L. On rocks in woods ; common. 

 Adiantum, L. Maidenhair Fern. 



A. pedatum, L. Rich, moist woods ; common. 



Pteris, L. Brake. 



P. aquilina, L. (Common Brake.) Pastures and woods ; everywhere. 



Pellsea, Link. Cliff-Brake. 



P. gracilis. Hook. Wet, limestone rocks. Norwich, Vt., Dr. Edward 

 Hyde ; rare. 

 Asplenium, L. Spleenwort. 



A. Trichomanes, L. Shaded rocks ; common. 



A. ebeneum, Ait. Rocky woods ; common. 



A. angustifolium. Michx. Rich, moist woods. Hanover, N. H., Miss 

 Hitchcock ; Windsor and Pomfret, Vt. Not very abundant. 



A. thelypteroides, Michx. Rich woods ; common. 



A. Filix-foemina, Bernh. (Lady-Fern.) Frequent and variable. 



