Because the trap rock ridges generate such varied terrain, they are the home of several plant and animal species that are state-listed or globally rare.

Because the ridge generates such varied terrain, it is the home of several plant and animal species that are state-listed or globally rare.

"The course seems to cut right through part of that globally rare forest," Ms. Lowry said, "and it needs to be protected."

Anchialine pools are globally rare.

About a dozen species of plants and animals in Smoke Hole Canyon are considered to be "globally rare".

The globally rare interstitial amphipod, Stygobromus araeus, is closely associated with the groundwater in shell marl or limestone deposits.

Silene ovata is listed as G3 on the NatureServe conservation status, meaning it is vulnerable and globally rare.

This climatic quality allows the Nantucket Juneberry shrub, a globally rare species, to thrive here.

Letcombe Brook is a chalk stream, which is globally rare.

Atlantic white cedar swamps are a globally rare type of natural community.