Lysimachia christinae (scientific name: Gelsemiumelegans) is an annual vine of Gelsemiumelegans in Cucurbitaceae. Evergreen woody vine, 3- 12 meters long. Branchlets cylindrical, with longitudinal edges when young; When young, the whole plant is hairless except for the bract edge and pedicel. Produced in Jiangxi, Fujian, Taiwan Province, Hunan, Guangdong, Hainan, Guangxi, Guizhou, Yunnan and other provinces. Born in the mountain roadside bushes at an altitude of 500-2000 meters or under the sparse forests on moist and fertile hills and slopes. India, Myanmar, Thailand, Laos, Vietnam, Malaysia and Indonesia.

Growing environment: Kidney tea is born on the roadside below 2000 meters above sea level, in sunny bushes, or in sparse forests on slightly moist and fertile hills and slopes. I like the sun. I am not tolerant of low temperature, and I am also afraid of high temperature and frost. When the temperature is lower than 5℃, the young leaves will turn red and the plants will freeze to death at 0℃.