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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.
Larvae feed from August to June, initially in a whitish mine in the frond, and in the spring they leave the mine and burrow into a sorus, feeding on the sporangia.They later form a loose, portable case from empty sporangia and when fully grown in May the case resembles a misplaced sorus, especially on hart's-tongue fern (Asplenium scolopendrium).
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]
Pyrrosia lingua is a species of epiphytic fern in the family Polypodiaceae. It occurs through China and Southeast Asia and into Japan and Taiwan. [ 1 ] Pyrrosia lingua is grown as a cultivated plant, and multiple named cultivars have been developed.
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.
Ophioglossum, the adder's-tongue ferns, is a genus of about 50 species of ferns in the family Ophioglossaceae. The name Ophioglossum comes from the Greek meaning "snake-tongue". [ 3 ] Their cosmopolitan distribution is mainly in tropical and subtropical habitats .
Ophioderma pendulum is sometimes known as the old-world adder's-tongue. In Malaysia , it is known as daun rambu . [ 1 ] It is a fern in the family Ophioglossaceae , and is the type species of the genus Ophioderma .