Cover Illustration Top: Pinus clausa, sand pine, is the characteristic tree of Florida's white- sand-scrub habitat. Sand pine is found in many scattered areas in most parts of the state and extends outside Florida only into coastal Alabama. Left to right across bottom: Sphenostigma coelestinum, Bartram's ixia, is a beautiful violet-flowered relative of the iris which blooms for a few hours in the early morning, the flowers withering in the full sun. Bartram's ixia, discovered by the pioneer plant explorer William Bartram in 1766 along the St. John's River, is known only in seven counties in northeastern Florida. Asplenium cristatum, parsley spleenwort, is a tropical American species found very locally in central Florida. Lycopodium prostratum, a clubmoss, is a frequent plant of wet acid soils in northern Florida and of the southeastern coastal plain. Psilotum nudum, whisk-fern, is a primitive vascular plant found in hammocks throughout peninsular Florida and in tropical areas of both the Old and New World. Equisetum hyemale, a horsetail or scouring-rush, is the only member of a predominantly northern group of plants to be found in Florida. It occurs in the state only in a few colonies along the Apalachicola River in western Florida. These six species represent the six major groups of plants covered in this Checklist. Cover design by John Beckner.