 It is one of the largest tracts of conserved land in northern New Jersey.It serves to protect nine ecological communities harboring 380 plant species, 18 of which are rare.Some of the globally imperiled plants found in the area include Torrey's mountain mint ("Pycnanthemum torreyi") and basil-leaved mountain mint ("Pycnanthemum clinopodioides"), which, along with narrow-leaved vervain ("Verbena simplex"), are also classified as endangered by the state.