Webster's Revised Unabridged Dictionary · 1913

Hart's-tongue

Hart's-tongue (harts"tung`) , noun

(a)
(Botany) A common British fern (Scolopendrium vulgare), rare in America.
(b)
(Botany) A West Indian fern, the Polypodium Phyllitidis of Linnaeus. It is also found in Florida.