This section is from the book "An Experimental History Of The Materia Medica", by William Lewis.
Scolopendrium feu lingua cervina Pharm. Edinb. Lingua cervina officinarum C. B. Phyllitis Gerard. Asplenium Scolopendrium Linn. Harts-tongue: a plant with long, uncut, narrow bright green leaves, set on long hairy pedicles, and nipt at the bottom: it has no stalks or manifest flowers; the seeds are a fine dust, lying in large, rough, brown, transverse streaks on the backs of the leaves. It is peren-nial, and found green at all times of the year, in moist, shady, stony places.
The leaves of harts-tongue stand recommended as aperients and corroborants, in ob-structions of the hypochondriacal viscera, laxities of the intestines, and some disorders of the breast: they have been chiefly used in apozems and in-fufions, along with maidenhair, spleenwort, and other plants of the same kind, with which they appear to agree in virtue. To. the taste they are slightly roughish and sweetish: with solu-tion of chalybeate vitriol, they strike a blackish colour. When fresh, they yield, on being rubbed or bruised, a faint unpleasant smell, which' in drying is in great part dissipated.