This herbaceous, short-lived perennial plant is the national flower of Denmark and the state flower of Vermont. Widely grown as forage crop, the clover is valued for its nitrogen fixation, which elevates soil fertility, hence its use as a green manure crop. One of the ingredients in the eight-herb Essiac tea, its infusion is thought to mimic the effect of endogenous estrogen, relieving menstrual problems. The clover is reportedly used in the treatment of bronchitis, burns, cancers, ulcers, sedation, asthma, syphilis, and to quit smoking. The Red Clover grows up to 20–80 cm tall.