Thousand Islands level year-round, and support at least two living trees. The Thousand Islands archipelago is located at the outlet of Lake Ontario at the head of the Saint Lawrence River. The region is bisected by the Canada–United States border and covers portions of Jefferson and St. Lawrence counties in the U.S. state of New York, in addition to parts of the United Counties of Leeds and Grenville and Frontenac County in the Canadian province of Ontario. Geologically, most of the islands are located where a branch of the Canadian Shield runs south across the river to join with the Adirondacks. The
Thousand Islands (Cocoa Beach) (Sw.) Willd.), blolly ("Guapira discolor" (Spreng.) Little), black ironwood ("Krugiodendron ferreum"(Vahl) Urb.), twinberry ("Myrcianthes fragrans"(Sw.) McVaugh), white indigo-berry ("Randia aculeata" L.), saffron plumb ("Sideroxylon celastrinum"(Kunth) T. D. Penn.), and wild lime ("Zanthoxylum fagara" (L.) Sarg.). Many of these plants are not found farther north than Brevard County. The state of Florida and Cocoa Beach purchased the islands north of Minutemen Causeway in 1988. Acquisition of the remaining south islands was completed by 2007. These islands are managed as the Thousand Islands Conservation Area by Brevard County Environmentally Endangered Lands Program. Efforts to acquire the remaining privately held islands began in