_Woodwardia Virginica_ Sm. Chain fern. Frequent in swamps from Long Island to the western part of the State. Equisetaceae. _Equisetum arvense_ L. Field Horsetail. Very common in either wet or dry soil. Mr. Eaton describes a dozen different forms. _Equisetum fluviatile_ L. Borders of lakes and ponds. Not uncommon. _Equisetum palustre_ L. Swamps near Buffalo, _Clinton_, according to Eaton. Rare. _Equisetum hiemale_ L. Scouring Rush. Very common in swampy and gravelly places. Eaton describes seven forms. _Equisetum hiemale intermedium_ A. A. Eaton. Oneida Lake, _Dr. J. V. Haberer_. Rare. _Equisetum scirpoides_ Michx. Shaded ravines and sphagnum marshes. Widely scattered but scarce. _Equisetum sylvaticum_ L. Wood Horsetail. Marshes and borders of woods. Not uncommon. Eaton enumerates seven forms. _Equisetum variegatum_ Schleich. Brisbin Swamp, _Coville_; Oriskany and shores of Lake Ontario, _Paine_; Owasco Lake, _Prof. I. H. Hall_; along W. Canada Creek, near Herkimer, _J. V. Haberer_. Isoetaceae. _Isoetes Amesii_ A. A. Eaton, sp. n. (_I. riparia Canadensis_ Engelm. Also _I. Dodgei Eaton_.) Peekskill is the only known locality in this State, but the species is very common in New England. _Isoetes echinospora Braunii_ Engelm. The common form in New York State. _Isoetes echinospora muricata_ Engelm. Lake Luzern, _A. A. Eaton_. Rare. _Isoetes Engelmanni_ A. Br. Abundant along the Susquehanna river in Broome and Tioga counties, _Clute_. New York City, _Buchheister_. _Isoetes macrospora_ Durien. Catskill Mts., Schweinitz, according to A. A. Eaton. (_I. lacustris paupercula Engelm._) Rare. Lycopodiaceae. _Lycopodium alopecuriodes_ L. Babylon, L. I., _Clute_. Rare. _Lycopodium alopecuroides adpressum_ Chapm. Babylon, L. I., _Clute_; Forbell’s Landing, L. I., _M. Zimmerman_. Rare. _Lycopodium alopecuroides_ f. _polyclavatum_ McDonald. Staten Island, _Clute_. Rare. _Lycopodium annotinum_ L. Damp woods. Rather scarce, especially in western part of State. _Lycopodium annotinum pungens_ Spring. Summits of Mt. Marcy and Mt. McIntyre, _Professor Peck_. _Lycopodium clavatum_ L. Common Club Moss. Abundant in open woods and thickets. The var. _monastachyon_ Hook. was found on Bald Mt., Fulton Chain, by Dr. Haberer. _Lycopodium complanatum flabelliforme_, Fernald. Common. _Lycopodium complanatum Wibbei_ var. n. J. V. Haberer. Scarce. Mohawk Valley. Haberer in herb. Gilbert and in herb. Gray, No. 1,953. _Lycopodium inundatum_ L. Bogs and borders of swamps. Frequent except in southern and western part where it is rare. _Lycopodium inundatum Bigelovii_ Tuckerm. Riverhead, L. I., _Professor Peck_. _Lycopodium lucidulum_ Michx. On damp grounds or rocks. Common. _Lycopodium obscurum_ L. Woods. Common. _Lycopodium Selago_ L. Summits of Mts. Marcy and McIntyre and in Indian Pass. _Professor Peck._ Alpine and rare.