Senna obtusifolia (Chinese Senna nai to Sicklepod) ek rakam ke bean hae. Ii North, Central, aur South America, Asia, Africa, aur Oceania ke jangle me hoe hae, au iske dher jagha pe weed maana jaawe hae. Its leaves, seeds, and root are used in folk medicine, primarily in Asia. It is believed to possess a laxative effect, as well as to be beneficial for the eyes. As a folk remedy, the seeds are often roasted, then boiled in water to produce a tea. The plant's seeds are a commercial source of cassia gum, a food additive usually used as a thickener and named for the Chinese Senna's former placement in the genus Cassia. Roasted and ground, the seeds have also been used as a substitute for coffee. In traditional Korean medicine, they are called gyeolmyeongja (결명자) and usually prepared as tea. They are also used in Kampō (traditional Japanese medicine) where they are called ketsumei-shi (ケツメイシ, 決明子) or by their Chinese name jué míng zǐ (traditional: 決明子, simplified: 决明子).