844 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
LEMNACEAE. Duckweed Family.
Lemna sp.
Floats on water, generally in sluggish calcareous streams, where there is enough other vegetation to keep it from drifting out to sea faster than it grows. Leon, Wakulla, Jefferson, Citrus and Lake Counties.
ARACEAE. Arum Family.
Arisaema triphyllum (L.) Torr. Indian Turnip. Jack-in-the-pulpit.
Non-alluvial swamps between Arcadia and Nocatee, DeSoto County.
Nearly throughout temperate Eastern North America, but rather rare in the coastal plain.
Peltandra Virginica Raf.
In various marshy, marly or muddy places, widely distributed over the State, even to the south end of the Everglades. Not usually on good peat.
Widely distributed in the Eastern United States, outside of the mountains.
Peltandra sagittaefolia (Mx.) Morong.
In bays and non-alluvial swamps; rare. Egcambia, Walton, Alachua, Lake, and perhaps DeSoto County.
North Carolina to Mississippi, in the coastal plain.
Orontium aquaticum L.
In permanent gently flowing water, neither muddy nor calcareous, especially in estuaries at the mouths of the Blackwater and Suwannee Rivers.
Massachusetts to Florida, Missouri and Texas, mostly in the coastal plain.
Pistia spathulata Mx. Water Lettuce.
Floating in gently flowing, usually calcareous, never muddy, water. Lake, Sumter, Hernando and DeSoto Counties.
Florida, Texas, and tropical America.
PALMAE. Palm Family.
Sabal Palmetto (Walt.) R. & S. Cabbage Palmetto.
(PLATES 17.I, 21. FIG. 17.)
In various habitats, especially in low hammocks, where th, re is marl near the surface, and on borders of salt marshes. Follows the coast as far west as Washington County, and occurs in all the interior counties as far north as the southern edge of Alachua and Suwannee. Rarely more than 50 feet and perhaps never more than 100 feet above sea-level. Grows on several feet of peat in some of the St. Johns River swamps.
Cape Hatteras to St. Andrews Bay, within 60 miles of the coast. (Probably not more than 25 miles inland in Georgia, or 1o miles inland in the Carolinas).