PRELIMINARY REPORT ON PEAT. Hydrocotyle Bonariensis Lam.? Usually floating in still deep water, especially if calcareous. Noticed in the estuaries of Santa Rosa County, in the Withlacoochee, Homosassa and Panasoffkee Rivers and Helena Run, in the St. Johns River swamps near Astor, and in Lakes Griffin, Harris, Dora and Apopka. Probably introduced from the tropics. Hydrocotyle umbellata L. Peat prairies, sandy prairies, shores of small lakes, etc. Leon, Madison, Alachua, Lake, Polk, Hillsborough, and doubtless many other counties. Widely distributed in the Eastern United States and tropical America. ARALIACEAE. Ginseng Family. Aralia spinosa L. Prickly Ash. Usually in hammocks or on bluffs, but grows on a few feet of peat in the St. Johns River swamp near Palatka, and probably elsewhere. Widely distributed in the Eastern United States between latitudes 290 and 400. CORNACEAE. Dogwood Family. Cornus stricta Lam. Chiefly in calcareous swamps, sloughs and low hammocks, from DeSoto County northward. Sometimes on several feet of peat, but such peat is generally impure, or full of logs, or both. Virginia to Mississippi. Nyssa Ogeche Marsh. Tupelo Gum or Ogeechee Lime. North of latitude 300, in swamps and sloughs of various kinds, mostly where the water is non-calcareous and fluctuates about two feet. Rather common from the Tallahassee meridian west to the mouth of the Choctawhatchee River. Becomes a medium-sized tree in the estuarine swamps of the Choctawhatchee and Apalachicola Rivers. (It does not seem to grow above the reach of the tides on the latter river or any of its tributaries.) Farther east, near the St. Marys River, it is a small tree or large shrub, and grows often around ponds. Extreme southern South Carolina to West Florida. Nyssa uniflora Wang. (N. aquatica L., in part.) Tupelo Gum. In swamps and sloughs, affecting more muddy or calcareous situations than the preceding, and flourishing especially in alluvial swamps. Known in Florida only from Leon and Wakulla Counties on the east to the Choctawhatchee River on the west. Rarely if ever on good peat. Virginia to Florida, Illinois and Texas, mostly in the coastal plain. Nyssa biflora Walt. Black Gum. IT non-alluvial swamps, shallow ponds, etc., but not averse to a little lime. Common in all the northern tier of counties, and extending as far south as DeSoto County. Seems to be rare in the lake region and east of there. Maryland to Texas, mostly in the coastal plain.