Some Constituents of the Poison Ivy Plant (Rhus Toxicodendron)
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Some Constituents of the Poison Ivy Plant (Rhus Toxicodendron) - William Anderson Syme
William Anderson Syme
Some Constituents of the Poison Ivy Plant (Rhus Toxicodendron)
Published by Good Press, 2022
goodpress@okpublishing.info
EAN 4064066129996
Table of Contents
(RHUS TOXICODENDRON)
INTRODUCTION.
KHITTEL'S INVESTIGATION.
WORK OF MAISCH.
PFAFF'S WORK.
EXPERIMENTAL.
GALLIC ACID.
FISETIN.
RHAMNOSE.
THE POISON.
POTASSIUM PERMANGANATE AS A REMEDY FOR RHUS POISONING.
SUMMARY.
BIOGRAPHY.
(RHUS TOXICODENDRON)
Table of Contents
INTRODUCTION.
Table of Contents
Plants belonging to the natural order Anacardiaciæ (Cashew family or Sumach family) are found in all the temperate climates of the world and quite frequently in semi-tropical climates. Many of these plants play important parts in economic botany, yielding dye-stuffs, tanning material, wax, varnish, and drugs. Several species are poisonous. At least three poisonous species of the genus Rhus are found in the United States. These three are all common and well-known plants, but confusion frequently arises concerning them on account of the different names by which they are known in different localities. For example, poison ivy (Rhus toxicodendron or Rhus radicans) probably the best known poisonous plant in America, being found in all the States except those in the extreme West, is often confounded with and popularly called poison oak.
The true poison oak is the Rhus diversiloba of the Western States.[1] The third and most poisonous species of this plant is Rhus venenata or Rhus vernix; it is the Rhus vernicifera of Japan, from which Japanese lac is obtained. It is popularly known in the United States as poison sumach,
poison dogwood
and poison elder.
It grows in swamps from Canada to Florida.
As the poison ivy is by far the most common of these plants in the Eastern States, a brief description of it is given here:[2] A shrub climbing by rootlets over rocks, etc., or ascending trees, or sometimes low and erect; leaflets 3, rhombic-ovate, mostly pointed, and rather downy beneath, variously notched, sinuate, or cut-lobed; high climbing plants (R. radicans) having usually more entire leaves. It is found in thickets, low grounds, etc. Greenish flowers appear in June.
Fig. 1.—Poison ivy (Rhus radicans or Rhus toxicodendron). a, spray showing aerial rootlets and leaves; b, fruit—both one-fourth natural size. (Chesnut, Bulletin No. 20, Division of Botany, U. S. Department of Agriculture.)Fig. 1.—Poison ivy (Rhus radicans or Rhus toxicodendron). a, spray showing aerial rootlets and leaves; b, fruit—both one-fourth natural size.
(Chesnut, Bulletin No. 20, Division of Botany, U. S. Department of Agriculture.)
In the general description of the order Anacardiaciæ, Gray[3] says: Juice or exhalations often poisonous.
Whether it is contact with some part of the plant, or with the exhalation from the plant, that causes the well-known skin eruption has been a topic for discussion ever since its source was known. On account of its intangible nature there has been more speculation than experimental evidence bearing on this question, although a few investigations have been made with the object of isolating the poison. It is most generally believed that the exhalations are poisonous. Dr. J. H. Hunt[4] states that the exhalations have been collected in a jar and found to be capable of inflaming and blistering the skin of an arm plunged into it.
Fig. 3—Poison sumach (Rhus vernix), showing leaves, fruit, and leaf-scars, one-fourth natural size.
(Chesnut, Bulletin No. 20, Division of Botany, U. S. Department of Agriculture.)
Prof. J. J. Rein,[5] in his treatise on Lacquer Work, describes the poison of the Japanese lac tree, Rhus vernicifera, as being volatile, as do also the Japanese chemist Yoshida[6] and the French chemist Bertrand.[7] Recent work by Prof. A. B. Stevens,[8] however, seems to show