Meaning of adder's tongue in English:

adder's tongue

noun

(also US adder-tongue)
  • 1A fern having a single pointed oval frond and a straight spore-bearing stem.

    Genus Ophioglossum, family Ophioglossaceae, in particular O. vulgatum

    ‘In it grow such ferns as adder's tongue fern, bog fern, Christmas fern, crested fern, Goldie's fern, maidenhair fern, New York fern, ostrich fern, and spinulose woodfern.’
    • ‘The general conclusion was that the impact of the first year's cattle grazing had helped the adder's tongue fern to thrive.’
    • ‘Since they sprout from perennial caudices, the adder's tongue ferns were presumably established in the chamise understory.’
    • ‘We have beautiful new note cards depicting fetid adder's tongues, woodland wildflowers, northwest conifers, and Mill Valley lichens.’
    • ‘Over 103 species of grasses and herbs have been recorded in the meadows including green-winged orchid, common spotted orchid, adder's tongue, pepper-saxifrage, yellow rattle and saw-wort.’
  • 2North American

    another term for dog's-tooth violet, especially a trout lily

    • ‘Adder's tongue is a perennial plant that grows to 1 foot high.’