PLANTS OF ONEIDA COUNTY AND VICINITY. 175 



CRYPTOGAMIA. Flowerless Plants. 



III. ACROGENS. Top-growers. 



EQUISETACE^. Horsetails. 



EQUISETUM, L. Equiseta. 



ARVENSE, L. Field Equisetum. 



River and ravine-sides, low grounds along streams, embankments of rail- 

 roads, sometimes in meadows. Common. April. 



SYLVATICUM, L. . Woodland Equisetuvi. 



Shady banks, wet woods, arbor-vitae swamps. Abundant. May. 



LIMOSUM, L. Mud Equisetum. 



Low river-banks, miry marshes. Throughout the valley of the Mohawk. 

 Occasionally in swamps on the hills. Frequent. June. 



HYEMALE, L. Winter -lasting Equisetum. 



Springy sidehills. Common. May. 



VARIEGATUM, Schleicher. Variegated-sheathed Equisetum. 



Sandy shores. Steep banks of the Oriskany creek above the Dexter factories, 

 near the base of the slope, in shade. On an island in Ovvasco lake, Cayuga 

 county, I. H. Hall. All along the shore of Lake Ontario, from Sodus point, 

 Wayne county, to Braddock's bay, Monroe county. Rare. April, May. 



SCIRPOIDES, Michaux. Scirpus-like Equisetum. 



"Wet banks and cedar swamps. College-hill, Clinton. Near the Chenango 

 canal, three miles southwest of Utica. On the flats of the Mohawk, in the 

 deep swamp between Utica and Frankfort. Fairfield, Herkimer county; also 

 common in many places in Bridgewater, Gray. Scarce. April. 



riLICES. Ferns. 



POLYPODIUM, L. Polypods. 



VULGARE, L. Common Polypodium. 



Rocks, ravine-sides, swamps. Frequent. August - October. 



PHEGOPTERis, L. Beech Fern. Wood Polypodium. 



Shady ravines, stream-bottoms, moist woods. Abundant. June, July. 



HEXAGONOPTERUM, Michaux. Six-angled-tvingcd Polypodium. 



Moist woodlands. Herkimer. Gray. Between New-Hartford and Paris hill. 

 Auburn, Cayuga county, /. H. Hall. Lodi, Seneca county, Gray. Gorham, 

 Ontario county, Sartwell in herb. Ham. Coll. Abundant in the valley of Ge- 

 nesee river. Scarce. July, August. 



DRYOPTERis, L. Tree-like Polypodium. 



Moist banks along streams. Common in cedar swamps. 



Abundant, June, July. 



