THE KALMIA.
The Kalmia, on account of its superficial resemblance to the green bay-tree, often called the American laurel, is more nearly allied to the heath. The name of Kalmia, which is more musical than many others of similar derivation, was given to this genus of evergreen shrubs by Linnæus, in honor of Peter Kalm, a distinguished botanist and one of his pupils. This is exclusively an American family of plants, containing only five species, three of which are natives of New England soil and two of them among our most common shrubs.
THE MOUNTAIN LAUREL.
Not one of our native shrubs is so generally admired as the Mountain Laurel; no other equals it in glowing and magnificent beauty. But the “patriots” who plunder the fields of its branches and flowers for gracing the festivities of the “glorious Fourth” will soon exterminate this noble plant from our land. There are persons who never behold a beautiful object, especially if it be a flower or a bird, without wishing to destroy it for some selfish, devout, or patriotic purpose. The Mountain Laurel is not so showy as the rhododendron, with its deeper crimson bloom; but nothing can exceed the minute beauty of its individual flowers, the neatness of their structure, and the delicacy of their shades as they pass from rose-color to white on different bushes in the same group. The flower is monopetalous, expanded to a cup with ten angles and scalloped edges. “At the circumference of the disk on the inside,” says Darwin, “are ten depressions or pits, accompanied with corresponding prominences on the outside. In these depressions the anthers are found lodged at the time when the flower expands. The stamens grow from the base of the corolla, and bend outwardly, so as to lodge the anthers in the cells of the corolla. From this confinement they liberate themselves, during the period of flowering, and strike against the sides of the stigma.” This curious internal arrangement of parts renders the flower very beautiful on close examination. The flowers are arranged in flat circular clusters at the terminations of the branches.
We seldom meet anything in the forest more attractive than the groups of Mountain Laurel, which often cover extensive slopes, generally appearing on the edge of a wood, and becoming more scarce as they extend into the interior or wander outwardly from the border. But if we meet with an opening in the wood where the soil is favorable,—some little sunny dell or declivity,—another still more beautiful group opens on the sight, sometimes occupying the whole space. The Mountain Laurel does not constitute the undergrowth of any family of trees, but avails itself of the protection of a wood where it can flourish without being overshadowed by it. In the groups on the outside of the wood, the flowers are usually of a fine rose-color, fading as they are more shaded, until in the deep forest we find them, and the buds likewise, of a pure white. I am not acquainted with another plant that is so sensitive to the action of light upon the color of its flowers. The buds, except in the dark shade, before they expand, are of a deeper red than the flowers, and hardly less beautiful.
The Mountain Laurel delights in wet places, in springy lands on rocky declivities where there is an accumulation of soil, and in openings surrounded by woods, where the land is not a bog, but wet enough to abound in ferns. In such places the Kalmia, with its bright evergreen leaves, forms elegant masses of shrubbery, even when it is not in flower. Indeed, its foliage is hardly less conspicuous than its flowers. I believe the Kalmias are not susceptible of modification by the arts of the florist. Nature has endowed them with a perfection that cannot be improved.
THE LOW LAUREL, OR LAMBKILL.
The low Laurel, or small Kalmia, is plainly one of nature’s favorite productions; for, the wilder and ruder the situation, the more luxuriant is this plant and the more beautiful are its flowers. These are of a deep rose-color, arranged in crowded whorls around the extremities of the branches, with the recent shoot containing a tuft of newly formed leaves surmounting each cluster of flowers. This plant, though not celebrated in horticultural literature or song, is one of the most exquisite productions of nature. Many other shrubs which are more showy are not to be compared with this in the delicate structure of its flowers and in the beauty of their arrangement and colors. Of this species the most beautiful individuals are found on the outer edge of their groups.
There has been much speculation about the supposed poisonous qualities of this plant and its allied species. Nuttall thought its flowers the source of the deleterious honey discovered in the nests of certain wild bees. There is also a general belief that its leaves are poisonous to cattle and flocks. But all positive evidence is wanting to support any of these notions. The idea associated with the name of this species is a vulgar error arising from a corruption of the generic name, from which Lambkill may be thus derived,—Kalmia, Kallamia, Killamia, Killam, Lambkill. There is no other way of explaining the origin of its common English name. I have never been able to discover an authentic account, and have never known an instance of the death of a sheep or a lamb from eating the leaves of this plant. It is an error having its origin in a false etymology; and half the notions that prevail in the world with regard to the medical virtues and other properties of plants have a similar foundation.
It is stated in an English manual of Medical Botany that the brown powder that adheres to the petioles of the different species of Kalmia, Andromeda, and Rhododendron is used by the North American Indians as snuff.
KALMIA.