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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).
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 .
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.
Glossopteris (etymology: from Ancient Greek γλῶσσα (glôssa, " tongue ") + πτερίς (pterís, " fern ")) is the largest and best-known genus of the extinct Permian order of seed plants known as Glossopteridales (also known as Arberiales, Ottokariales, or Dictyopteridiales).
Ophioglossaceae, the adder's-tongue family, is a small family of ferns. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is the only family in the order Ophioglossales , which together with the Psilotales is placed in the subclass Ophioglossidae . [ 1 ]
Ophioglossum azoricum is an Atlantic–Mediterranean species native to islands in the northern Atlantic Ocean and adjacent western and southwestern Europe from Greenland, Iceland and the British Isles in the north, to Macaronesia and the Iberian Peninsula in the south.