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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
Asplenium rhizophyllum plantlet sprouting from the leaf apex of its parent plant. The stipe (the stalk of the leaf, below the blade) is 0.5 to 12 centimetres (0.20 to 4.7 in) long [2] (occasionally up to 15 centimetres (5.9 in) long), and ranges from one-tenth to one and one-half times the length of the blade.
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.
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]
The following ferns have been recorded as food plants, [3] [4] rustyback (Asplenium ceterach) wall-rue (Asplenium ruta-muraria) hart's-tongue fern (Asplenium scolopendrium) maidenhair spleenwort (Asplenium trichomanes) bracken (Pteridium aquilinum) Larva of another moth, Psychoides filicivora also feed on ferns.
Ophioglossum vulgatum, commonly known as adder's-tongue, [1] southern adder's-tongue or adder's-tongue fern, is a species of fern in the family Ophioglossaceae. [ 2 ] The chloroplast genome was reported to have a size of 138,562 base pairs.