65 



PTERIDOPHYTA. 



EQUISETAOE^. 



460. Equisetum, L. Horse tail, Scouring Kush. 



E. arvense, L- Damp fields and pastures. 



E, sylvaticum, Damp woods. 



E. palustre, L- Shore of Lake Cbamplain, Pringle. 



E. limosum, Shallow water, border of ponds. 



E. littorale. Knight's Island, Lake Cbamplain and shore of 

 Lake Champlain at Ferrisburg, Pringle ; Islands in Ball's Bay, 

 Brainerd. 



E. hiemale, L. Moist banks. 



E. variegatum, Sch. Shore of Lake Champlain and Connecti- 

 cut river. 



E. scirpoides, Mx. Hemlock woods. 



OPHIOGLOSSAOE^. 



461. Ophioglossum, L. 

 0. vulgatum, L. Meadows. Not common. 



462. BOTEYCHIUM, Sw. 



B. simplex, Hitch. Dry fields. Pringle. Abundantly scattered 

 over Vermont, its habitat usually poor, cool soil, especially 

 knolis of hill pastures," Pringle. 



B. matricarisefolium, Al. Br. " Similarly scattered and abun- 

 dant in cool, damp soil of woodlands and open fields from the 

 sandy plains by the lake to the very mountain summits." 

 Pringle. 



B. ternatum, Sw. Pastures and hillsides throughout the 

 State. 



B. ternatum, Sw. var. obliquum, Mill. Hills, "cool sandy 

 soil of open fields." Pringle. 



B. ternatum, Sw. var. dissectum, Mill. Found in similar 

 localities as the last. 



B. lanceolatum, Angs. Not common, cool woods. 



B. Virginianum, Sw. Woods throughout the State. 



FILICES. 



463. POLTPODIUM, L. 



p. vulgare, L. Common on damp, shaded cliffs and rocks. 



