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.