348 FLORIDA GEOLOGICAL SURVEY-THIRD ANNUAL REPORT.
Eleocharis cellulosa Torr. Round-grass.
In shallow water which is permanent or nearly so and has a gentle current. Estuarine marshes between Milton and Bagdad; Clear Lake, back of West Palm Beach; and in sloughs at the southern and southeastern edges of the Everglades.
Florida to Mexico; also in the West Indies.
All the species of E!eocharis are moisture-loving plants, and a few others which have not been identified occur in bays, marshes, lakes, etc. Two especially are very abundant in the Crescent Lake marsh.
Scirpus Cubensis Poeppig &, Kunth
Floating with water-hyacinths, etc., in the Withlacoochee River near Istachatta and at the southwestern corner of Lake Minneola, near Clermont.
Introduced from the tropics.
Scirpus lineatus Mx.?
In springy places at the edge of the Apalachicola River swamp in Jackson County, and in the swamps of Hog Island at the mouth of the Suwannee River.
Widely but irregularly distributed in the Eastern United States.
Scirpus validus Vahl (PLATE 19.2.)
In permanent gently flowing water, mostly in estuaries and calcareous rivers. Walton, Washington, Franklin, Wakulla, Levy, Sumter, Lake, Orange and Dade Counties.
Widely distributed in temperate North America. By some authors united with the European S. lacustris L.
Four or five other species of Scirpus occur in wet places in Florida, and may contribute to the formation of peat.
Fuirena scirpoidea Mx.
Frequent on margins of lakes, sometimes in the water and sometimes on shore. Also in peat prairies, estuarine marshes, etc., and more rarely in low pine lands. Escambia, Santa Rosa, Wakulla, Clay, Lake, Polk and Dade Counties.
Southeast Georgia to Louisiana, in the coastal plain.
Dulichium arundinaceum (L.) Britton
In a creek-swamp near Milton, also in bays, in Leon, Jefferson and Madison Counties, always in sour water.
Nearly throughout the glaciated region and coastal plain; also in the mountains of Maryland, Kentucky and Alabama.
Cyperus Haspan L.
In fresh marshes near Escambia, Milton, Crescent Lake and West Apopka.
Virginia to Texas, in the coastal plain. Also in the tropics.