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Because of its rarity, censuses of the fern in this region of New York have been reported periodically since 1916. [15] In 1989, this species was declared as endangered in the United States. [4] The most thriving site for hart's tongue through about 1925 was not Glacier Lake, but a second similar lake about 2 miles (3.2 km) due east. [18]
Linnaeus first gave the hart's-tongue fern the binomial Asplenium scolopendrium in his Species Plantarum of 1753. [4] The Latin specific epithet scolopendrium is derived from the Greek skolopendra, meaning a centipede or millipede; this is due to the sori pattern being reminiscent of a myriapod's legs. [5] [6]
Asplenium rhizophyllum, the (American) walking fern, is a frequently-occurring fern native to North America. It is a close relative of Asplenium ruprechtii [ 2 ] (syn: Camptosorus sibiricus ) which is found in East Asia and also goes by the common name of "walking fern".
N Asplenium rhizophyllum – walking fern N Asplenium ruta-muraria – wall-rue N Asplenium scolopendrium var. americanum – American Hart's-tongue fern Special Concern
Another, between A. pinnatifidum and the tetraploid American hart's-tongue fern (A. scolopendrium var. americanum) yielded peculiar specimens with a long blade, similar in texture and doubled indusia to the hart's-tongue fern, but lengthened and tapering to a point, and not lobed except for two surprisingly large auricles at the base. [32]
Owing to the damp nature of the exposed rock faces in the bottom of the gullet, it has become colonised by hart's-tongue fern. To the west of the gullet, a grassland area surrounded by scrub and hedgerows supports a variety of plants including meadow vetchling and hop trefoil.
Soft Shield Fern Polystichum setiferum, Lady Fern Athyrium filix-femina [2] and Hart's Tongue Fern Asplenium scolopendrium are known to have around three hundred varieties or sports. [3] Scaly Male Fern Dryopteris affinis and Male Fern Dryopteris filix-mas have a number of commercially available and naturally occurring sports or subspecies ...
Asplenium rhizophyllum — walking-fern spleenwort; Asplenium ruta-muraria — wallrue spleenwort; Asplenium scolopendrium — hart's-tongue fern; Asplenium trichomanes — maidenhair spleenwort; Asplenium viride — green spleenwort