Its ashes when burnt contain much vegetable alkali which has been used freely in making glass.
It was customary to "watch the Fern" on Midsummer eve, when the plant put forth at dusk a blue flower, and a wonderful seed at midnight, which was carefully collected, and known as "wish seed." This gave the power to discover hidden treasures, whilst to drink the sap conferred perpetual youth.
The Royal Fern (Osmunda regalis), grows abundantly in many parts of Great Britain, and is the stateliest of Ferns in its favourite watery haunts. It heeds a soil of bog earth, and is incorrectly styled "the flowering Fern," from its handsome spikes of fructification. One of its old English names is "Osmund, the Waterman"; and the white centre of its root has been called the heart of Osmund. This middle part boiled in some kind of liquor was supposed good for persons wounded, dry-beaten, and bruised, or that have fallen from some high place. The name "Osmund" is thought to be derived from os, the mouth, or os, bone, and mundare, to cleanse, or from gross mond kraut, the Greater Moonwort; but others refer it to Saint Osmund wading a river, whilst bearing the Christ on his shoulders. The root or rhizome has a mucilaginous slightly bitter taste. The tender sprigs of the plant at their first coming are "good to be put into balmes, oyles, and healing plasters." Dodonoeus says, "the harte of the root of [187] Osmonde is good against squattes, and bruises, heavie and grievous falles, and whatever hurte or dislocation soever it be." "A conserve of these buds," said Dr. Short of Sheffield, 1746, "is a specific in the rickets; and the roots stamped in water or gin till the liquor becometh a stiff mucilage, has cured many most deplorable pains of the back, that have confined the distracted sufferers close to bed for several weeks." This mucilage was to be rubbed over the vertebrae of the back each night and morning for five or six days together. Also for rickets, "take of the powdered roots with the whitest sugar, and sprinkle some thereof on the child's pap, and on all his liquid foods." "It maketh a noble remedy," said Dr. Bowles, "without any other medicine." The actual curative virtues of this Fern are most probably due to the salts of lime, potash, and other earths, which it derives in solution from the bog soil, and from the water in which it grows. On July 25th it is specially dedicated to St. Christopher, its patron saint.
The Hart's Tongue or Hind's Tongue, is a Fern of common English growth in shady copses on moist banks, it being the Lingua cervina of the apothecaries, and its name expressing the shape of its fronds. This, the Scolopendrium vulgare, is also named "Button-hole," "Horse tongue;" and in the Channel Islands "Godshair." The older physicians esteemed it as a very valuable medicine; and Galen gave it for diarrhoea or dysentery. By reason of its tannin it will restrain bleedings, "being commended," says Gerard, "against the bloody flux." People in rural districts make an ointment from its leaves for burns and scalds. It was formerly, in company with the common Maidenhair Fern, one of the five great capillary herbs. Dr. Tuthill Massy advises the drinking, in Bright's disease, of as much as three [188] half-pints daily of an infusion of this Fern, whilst always taking care to gather the young shoots. Also, in combination (H.) with the American Golden Seal (Hydrastis canadensis). the Hart's Tongue has served in not a few authenticated cases to arrest the progress of that formidable disease, diabetes mellitus. Its distilled water will quiet any palpitations of the heart, and will stay the hiccough; it will likewise help the falling of the palate (relaxed throat), or stop bleeding of the gums if the mouth be gargled therewith.
From the Ophioglossum vulgatum, "'Adder's tongue,' or 'Christ's Spear,' when boiled in olive oil is produced a most excellent greene oyle. Or rather a balsam for greene wounds, comparable to oyle of St. John's Wort; if it doth not far surpasse it." A preparation from this plant known as the "green oil of charity," is still in request as a vulnerary, and remedy for wounds.
The true Maidenhair Fern (Adiantum capillus veneris), of exquisite foliage, and of a dark crimson colour, is a stranger in England, except in the West country. But we have in greater abundance the common Maidenhair (Asplenium trichomanes), which grows on old walls, and which will act as a laxative medicine; whilst idiots are said to have taken it remedially, so as to recover their senses. The true Maidenhair is named Adiantum, from the Greek: Quod denso imbre cadente destillans foliis tenuis non insidet humor, "Because the leaves are not wetted even by a heavily falling shower of rain." "In vain," saith Pliny, "do you plunge the Adiantum into water, it always remains dry." This veracious plant doth "strengthen and embellish the hair." It, occurs but rarely with us; on damp rocks, and walls near the sea. The Maidenhair is called Polytrichon because it brings forth a multitude of hairs; [189] Calitrichon because it produces black and faire hair; Capillus veneris because it fosters grace and love.
From its fine hairlike stems, and perhaps from its attributed virtues in toilet use, this Fern has acquired the name of "Our Lady's Hair" and "Maria's Fern." "The true Maidenhair," says Gerard, "maketh the hair of the head and beard to grow that is fallen and pulled off." From this graceful Fern a famous elegant syrup is made in France called Capillaire; which is given as a favourite medicine in pulmonary catarrh. It is flavoured with orange flowers, and acts as a demulcent with slightly stimulating effects. One part of the plant is gently boiled with ten parts of water, and with nineteen parts of white sugar. Dr. Johnson says Boswell used to put Capillaire into his port wine. Sir John Hill instructed us that (as we cannot get the true Maidenhair fresh in England) the fine syrup made in France from their Fern in perfection, concocted with pure Narbonne honey, is not by any means to be thought a trifle, because barley water, sweetened with this, is one of the very best remedies for a violent cold. But a tea brewed from our more common Maidenhair will answer the same purpose for tedious coughs. Its leaves are sweet, mucilaginous, and expectorant, being, therefore, highly useful in many pulmonary disorders.
The common Polypody Fern, or "rheum-purging Polypody" grows plentifully in this country on old walls and stumps of trees, in shady places. In Hampshire it is called "Adder's Tongue," as derived from the word attor, poison; also Wall-fern, and formerly in Anglo-Saxon Ever-fern, or Boar-fern. In Germany it is said to have sprung from the Virgin's milk, and is named Marie bregue. The fresh root has been used successfully in decoction, or powdered, for melancholia; [190] also of late for general rheumatic swelling of the joints. By the ancients it was employed as a purgative. Six drachms by weight of the root should be infused for two hours in a pint of boiling water, and given in two doses. This is the Oak Fern of the herbalists; not that of modern botanists (Polypodium dryopteris); it being held that such Fern plants as grew upon the roots of an oak tree were of special medicinal powers, Quod nascit super radices quercûs est efficacius. The true Oak Fern (Dryopteris) grows chiefly in mountainous districts among the mossy roots of old oak trees, and sometimes in marshy places. If its root is bruised and applied to the skin of any hairy part, whilst the person is sweating, this will cause the hair to come away. Dioscorides said, "The root of Polypody is very good for chaps between the fingers." "It serveth," writes Gerard, "to make the belly soluble, being boiled in the broth of an old cock, with beets or mallows, or other like things, that move to the stool by their slipperiness." Parkinson says: "A dram or two, it need be, of the powdered dry roots taken fasting, in a cupful of honeyed water, worketh gently as a purge, being a safe medicine, fit for all persons and seasons, which daily experience confirmeth." "Applied also to the nose it cureth the disease called polypus, which by time and sufferance stoppeth the nostrils." The leaves of the Polypody when burnt furnish a large proportion of carbonate of Potash.
The Spleenwort (Asplenium ceterach—an Arabian term), or Scaly Fern, or Finger Fern, grows on old walls, and in the clefts of moist rocks. It is also called "Miltwaste," because supposed to cure disorders of the milt, or spleen:—
"The Finger Fern, which being given to swine,
It makes their milt to melt away in fine."