64 FLORA OF WORCESTER COUNTY. 



AGROPYRUM, Gaertn. Wheat- Grass. 



repens, Beauv. Quitch-Grass. Common. 



ELYMUS, L. Wild Rye. 



Virginicus, L. Wet places. 



Canadensis, L. " " 



ASPRELLA, Willd. Bottle-brush Grass. 



Hystrix, Willd. Moist woodlands. 



SERIES II. CRYPTOGAMIA. 



CLASS III. ACROGEN^E. 

 SUBCLASS I. PTERIDOPHYTA. 



EQUISETACE^E. 



EQUISETUM, L. Horsetail. 



arvense, L. Common Horsetail. Gravelly soil, 



sylvaticum, L. Moist shaded places, 



limosum, L. In shallow water, 



hyemale, L. G. E. Stone. 



scirpoides, Michx. Southbridge. Z. E. Ammidown. 



FILICES. v 



POLYPODIUM, L. Polypody. 



vulgare, L. Rocks, common. 



ADIANTUM, L. Maidenhair. 



pedatum, L. Rich moist woods. 



PTERIS, L. Brake. 



aquilina, L. Common Brake. Thickets, common. 



ASPLENIUM, L. Spleenwort. 



Trichomanes, L. Rare. 



