description Common St. John's Wort Overview
Common St. John's wort, Hypericum perforatum, is a perennial herb native to Europe and parts of Asia and Africa that has been introduced widely elsewhere. It has yellow flowers with five petals and leaves that appear dotted when held against light because of translucent glands. Extracts of the plant have been used in herbal medicine, but they can interact with medicines and are not pharmacologically neutral.
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