Lignumvitae Key Botanical State Park, Botanical state park in Monroe County, Florida Keys, United States
Lignumvitae Key is a 300-acre island park in the Florida Keys covered with dense tropical hardwood forest containing rare lignum vitae trees and other native plants. Historic structures sit within this thick vegetation, surrounded by mangrove shorelines that frame the interior landscape.
William Matheson, a Miami chemist, purchased the island in 1919 and built a residence with a windmill and rainwater collection system. The property reflects early 20th century settlement methods in this remote island location.
The island holds burial grounds and settlement traces left by the Calusa people, now protected within the mangrove vegetation. Walking through the park, visitors sense how the landscape was shaped by earlier inhabitants.
The island is accessible only by boat, and visitors need to join organized tours to explore the site. Tours depart from the Matheson House visitor center on several days throughout the week.
The island developed from an ancient coral reef where organic materials accumulated in pockets to create soil for diverse plant species. This geological foundation created conditions for the complex ecosystem that thrives there today.
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