Egyptian Verbbascum
Description:
V. thapsus is a dicotyledonous plant that produces a rosette of leaves in its first year of growth. The leaves are large, up to 50 cm long. The second-year plants normally produce a single unbranched stem, usually 1–2 m tall. In the eastern part of its range in China, it is, however, only reported to grow up to 1.5 m tall. The tall, pole-like stems end in a dense spike of flowers that can occupy up to half the stem length. All parts of the plants are covered with star-shaped trichomes. This cover is particularly thick on the leaves, giving them a silvery appearance. The species chromosome number is 2n = 36.
Uses:
Traditional medicine:
Although long used in herbal medicine, no drugs are manufactured from its components. Dioscorides first recommended the plant 2000 years ago, considering it useful as a folk medicine for pulmonary diseases. Leaves were smoked to attempt to treat lung ailments, a tradition that in America was rapidly transmitted to Native American peoples. The Zuni people, however, use the plant in poultices of powdered root applied to sores, rashes, and skin infections. An infusion of the root is also used to treat athletes foot. All preparations meant to be drunk have to be finely filtered to eliminate the irritating hairs.
Oil from the flowers was used against catarrhs, colics, earaches, frostbite, eczema, and other external conditions. Topical application of various V. thapsus-based preparations was recommended for the treatment of warts, boils, carbuncles, hemorrhoids, and chilblains, amongst others. Glycyrrhizin compounds with bactericide effects in vitro were isolated from flowers. The German Commission E describes uses of the plant for respiratory infections. It was also part of the National Formulary in the United States and United Kingdom.