Struthiopteris Germanica Willd. Ostrich fern. Frequent in the Valley of the Mohawk and its tributaries. Western part of the State, Torrey; Southern tier, Clute.
Woodsia glabella R. Br. Crevices of rocky ledges at Lake Avalanche and in the pass north of it, Professor Peck; Haines’ Falls, Catskill Mts., Professor Peck. The station at Little Falls has been destroyed by excavation.
Woodsia hyperborea R. Br. Rare. Adirondack Mts. Only three stations known—at Cascadeville, Lake Avalanche, and Ampersand Mt., Professor Peck.
Woodsia Ilvensis R. Br. Rusty Woodsia. On rocks and cliffs. Rather scarce.
Woodsia obtusa Torr. In rich woods and on rocks. Widely spread but not common.
Woodwardia angustifolia Sm. Flatbush and Middle Village, L. I., Professor Peck; Babylon and Bellville, L. I., Clute; Staten Island, Torrey.
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.