The preserve protects a unique dolomite-limestone glade and barrens system, now rare in Kentucky. Kentucky gladecress (Leavenworthia exigua var. laciniata
), an endangered species and candidate for federal listing, occurs at Apple Valley Glade. It is endemic to Bullitt and Jefferson counties, growing nowhere else in the world. The gladecress was first protected under a 23-acre conservation easement on June 27, 2003. An additional 37 acres were purchased and dedicated as Apple Valley Glade State Nature Preserve on June 14, 2012. The small rocky glade openings scattered among cedar and oak woodlands contain many rare plant species, including Crawe’s sedge (Carex crawei
) and Ringseed rush (Juncus filipendulus
). Access is by written permission only.