The stems are the above-ground part of herbs, which contain many useful substances. These are found in medicinal plants such as baboon's teeth, basil, white wormwood, yarrow, willow, devil's mouth, St. John's wort, snake's milk, hyssop, whipwort, clematis, cat's-foot, patch, thyme, eyebright, field horsetail, ranunculus, oregano, dewdrop, St. John's wort, black wormwood.
In folk medicine, they are known for their beneficial action in: impotence, sterility, stomach pain, indigestion, insomnia, migraine, liver and bile problems, intestinal parasites, ulcer, gastritis, hemorrhoids, bronchitis, gout, rheumatism, prostatitis, headache, palpitations, stress, exhaustion, hypertension, coronary disease, cardiovascular failure, etc.
