Cassia seed tea is made from Semen Cassiae, which is the dried mature seed of Millet or Cassia obtusifolia of Leguminosae. Cassia seed is also called Cassia, Myrica rubra, Yangjiao, Equisetum equisetum, Crocodile bark, Crocodile bean, Pseudo mung bean, Horseshoe seed, Senecio scandens, Crocodile bean, Wild mung bean, Pig bone, Crocodile bean, Crocodile bean with thin leaves, Crocodile bean and Crocodile bean. It tastes bitter, sweet and cool, and has the functions of clearing liver and purging fire, expelling wind and removing dampness, tonifying kidney and improving eyesight.