PRELIMINARY REPORT ON PEAT. Cyperus virens Mx. Estuarine swamps or marshes of the Escambia and Apalachicola Rivers. North Carolina to Central,America. GRAMINEAE. Grass Family. Phragmites communis Trin. Reed-grass. In large fresh marshes, such as the Everglades, and along estuaries and lakes, especially where the water is a little calcareous. Escambia, Walton, Washington, Franklin, Levy, Citrus, Lake and Dade Counties. Widely distributed in the North Temperate Zone. Spartina Bakeri Merrill. (PLATES 24.2, 26.2.) Grows just about high-water mark on the borders of lakes, open ponds, marshes, peat prairies, etc. Occasionally abundant well out on prairies and marshes, on several feet of peat (especially in the Julington Creek and Crescent Lake marshes, described on pages 287-289, and scattered over the southern portion of the Everglades. Pretty widely distributed over peninsular Florida. Franklin, Duval, St. Johns, Putnam, Volusia, Lake, Orange, Osceola, Polk and Dade Counties. Found once by the writer near Brunswick, Ga. Otherwise not known outside of Florida. Spartina glabra Muhl. (PLATE 17.) Abundant in salt marshes in the northern half of the State. Franklin, Nassau, Duval, St. Johns, Levy and Volusia Counties. Maine to Texas, along the coast. S. juncea (Mx.) Ell. occasionally grows with it, or in the drier parts of the same marshes, near Cedar Keys at least. It is said to range from Newfoundland to Texas. Homalocenchrus hexandrus (Sw.) Kuntze In shallow water, Hicks's Prairie, Lake County. Eastern North Carolina to Argentina, etc. Zizania aquatica L. Wild Rice. Estuaries of the Escambia. Blackwater, Choctawhatchee, Apalachicola and Suwannee Rivers. * New Brunswick to Manitoba, in the glaciated region, south in the coastal plain to Texas. Also reported from Eastern Asia. Chaetochloa magna (Griseb.) Scribn. (Swamp Millet). In marshes and prairies which have been ditched or otherwise tampered with. Lake, Manatee and Dade Counties. Introduced from the West Indies. 349