The herb is sometimes employed like the root and the entire plant was official from 1830 to 1840.
In some sections the young, tender shoots are used for greens, like those of pokeweed, but great care must be exercised to gather them before they are too far advanced in growth, as otherwise bad results will follow.
A blue coloring matter has been prepared from the plant and used as a substitute for indigo, to which, however, it is very much inferior.
Pleurisy-Root.
Asclepias Tuberosa L.
Pharmacopoeial Name — Asclepias.
Other Common Names — Butterfly weed, Canada-root, Indian-posy, orange-root, orange swallowwort, tuberroot, whiteroot, windroot, yellow or orange milkweed.
Habitat and Range — Pleurisy-Root flourishes in the open or in the pine woods, in dry, sandy or gravelly soil, usually along the banks of streams. Its range extends from Ontario and Maine to Minnesota, south to Florida, Texas and Arizona, but it is found in greatest abundance in the South.
Description of Plant — This is a very showy and ornamental perennial plant, indigenous to this country, and belonging to the milkweed family (Asclepiadaceae); it is erect and rather stiff in habit, but with brilliant heads of bright orange-colored flowers that attract attention from afar.
The stems are rather stout, erect, hairy, about 1 to 2 feet in height, sometimes branched near the top, and bearing a thick growth of leaves. These are either stemless or borne on short stems, are somewhat rough to the touch, 2 to 6 inches long, lance shaped or oblong, the apex either sharp pointed or blunt, with a narrow, rounded or heart shaped base. The flower heads, borne at the ends of the stem and branches, consist of numerous, oddly shaped orange colored flowers. The corolla is composed of five segments, which are reflexed or turned back and the crown has five erect or spreading "hoods," within each of which is a slender incurved horn. The plant is in flower for some time, usually from June to September, followed late in the fall by pods, which are from 4 to 5 inches long, green, tinged with red, finely hairy on the outside, and containing the seeds with their long, silky hairs. Unlike the other milkweeds, the Pleurisy Root contains little or no milky juice.
Description of Root — The root of this plant is large, white and fleshy, spindle shaped, branching. As found in commerce it consists of lengthwise or crosswise pieces from 1 to 6 inches in length and about three-fourths of an inch in thickness. It is wrinkled lengthwise and also transversely and has a knotty head. The thin bark is orange brown and the wood yellowish, with white rays. It has no odor and a somewhat bitter, acrid taste.