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The most striking and unusual feature of the fern is its simple, strap-shaped undivided fronds. The supposed resemblance of the leaves to the tongue of a hart (an archaic term for a male red deer) gave rise to the common name "hart's-tongue fern". Asplenium scolopendrium. Asplenium scolopendrium sori. Asplenium scolopendrium prothallus
Specimen of American hart's tongue fern in Michigan; Clark Reservation has largest population of these endangered ferns in the U.S.. Clark Reservation is known for the diversity of fern species which grow there; in a 1994 survey, 26 fern species were identified. [14]
Entrance to Fern Cave. Fern Cave NWR is named after the eponymous cave located in the region; in it, explorers found an abundance of American hart's-tongue ferns (Asplenium scolopendrium var. americanum); in the modern day, the variation/subspecies is considered federally endangered.
Split Rock is also known as the locale for the discovery of the American hart's tongue fern by Frederick Pursh in 1807. [6] This fern is endangered in the United States. Its habitat in Split Rock as well as the remains of the limestone quarry and the munitions factory are preserved as a 32-acre (13-hectare) New York State Unique Area. [7]
Asplenium scolopendrium – hart's-tongue fern (sometimes in Phyllitis) Asplenium scolopendrium var. americanum – American Hart's-tongue; Asplenium seelosii; Asplenium septentrionale – forked spleenwort, northern spleenwort; Asplenium septentrionale × trichomanes Wulf. Asplenium serra; Asplenium serratum – wild bird's-nest fern ...
There are over 15 rare species in the area, such as the southern cavefish, gray bat, Indiana bat, American Hart's-tongue fern and Tennessee bladderfern. [2] During the American Civil War, saltpeter was mined to make gunpowder here, and the Confederates had a leather tanning operation until it was destroyed by Union forces. [4]