94 



SERIES II. 



CRYPTOGAMOUS, OR ELOWERLESS PLANTS. 



Class III. Acrogens. 



Order 112.— EQUISETACEiE. 135. 



1. Equisetum, L. 

 arvense, L. 



Sandy places along Brandjwine. Not common. 

 April, 

 sylvaticum, L. (Limestone Weed.) 



Limestone debris; Jackson's lime quarries. Rare 

 elsewhere, 

 hyemale, L. (Scouring Rush.) 



Wet banks; Noxentown pond. Detected by W. M. 

 Canby. June, 1860. 



Order 113.— FILICES. 136. 



Sub-Order 1.— POLYPODINE.E. 



1. POLYPODIUM, L. 



vulgare, L. 



Rocky woods and banks. Common. July, 

 hexagondpterum, Michx. 



Moist woods. Frequent. July. 



2. Pteris, L. 



aquillna, L. (Brake. Bracken.) 

 Moist woods, &c. Frequent. July. 



3. Adiantum, L. 



pedatum, L. (Maidenhair.) 



Rocky woods. Common. July. 



4. Woodwardia, Smith. 



angustifolia, Smith. 



Bogs; Thompson's, &c» Rare. Aug. 



