1826, from everglade (1823), from ever, apparently in sense of "endless" + glade. Charles Vignoles's "Observations upon the Floridas" (1823) has Eternal Glades and Ever Glade morass.
The distance from the mouth of Hilsborough river to the head of the lake, in a direct line, is about 110 statute miles. The country between them is mostly, if not wholly, an everglade, by which is meant a low marsh frequently covered with water, and in which there grows a sharp triangular grass, from ten to twelve feet high, and impervious to men or animals. ["American Mechanics' Magazine," 1825]
1. The Everglades National Park stretches across the southern tip of Florida.
2. Thinning reeds open to a watery view of Florida's Everglades National Park.
3. Airboat captain Red Wood knows how to get around the Everglades.
4. Friends of the Everglades was started by Marjory Stoneman Douglas.
5. The Everglades is the largest subtropical wilderness in the United States.