354 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
ISOETACEAE. Quillwort Family. Isoetes flaccida Shuttl.?
In the swamps of Hog Island, at the mouth of the Suwannee River.
South Georgia and Florida.
LYCOPODIACEAE. Club-moss Family. Lycopodium alopecuroides L. Ground-pine.
In estuarine swamps of Bayou Texar, Escambia County, and in bays between Capitola and Fanlew, in Leon and Jefferson Counties. Commoner in sandy bogs, especially in West Florida.
Long Island to Mississippi, mostly in the coastal plain.
Lycopodium Chapmani Underw.
Abundant on rather dry peat prairies and sandy shores of small lakes in Lake and Polk Counties. Reported from Lee and Dade Counties by Mr. A. A. Eaton.
Massachusetts to Louisiana, in the coastal plain.
SALVINIACEAE.
Azolla Caroliniana Willd.
Floating in ditches in the Julington Creek marsh, among the water-hyacinths in the Withlacoochee River near Istachatta, and near the head of the Wacissa River in Jefferson County.
Widely distributed in temperate North America, mostly near the coast.
FILICES. Ferns.
Nephrolepis exaltata (L.) Schott Sword or Boston Fern.
In non-alluvial swamps near Arcadia, DeSoto Co. Also in tropical hammocks in Dade County.
South Florida and tropical America.
Dryopteris unita (L.) Kuntze In non-alluvial swamps with rather shallow peat. Lake, Orange, Polk and DeSoto Counties.
South Florida and the West Indies.
Dryopteris Thelypteris (L.) Gray In calcareous swamps, nearly mature peat bogs, etc., in Hernando, Sumter and Lake Counties. Also in the estuarine swamps of the Choctawhatchee River.
Widely distributed in temperate Eastern North America, at least in the glaciated region and coastal plain.