. 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. 
S ALVIN I ACE AE. 
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. 
FILICE»S. Ferns. 
Nephrolepis exaltata (L.) Schott Sword or Boston Fern. 
In non-alluvial swamps near Arcadia, DeSoto Co. Also in tropical ham¬ 
mocks 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. 
