Tree Jasmine, an evergreen or semi-deciduous tree, known in Thai as kasalong kham and pihb thong, and with the botanical binomial name Radermachera ignea.

It grows to a height of between 6 to 20 meters and blooms from January to May, displaying clusters of tubular, bright orange flowers with a sweet jasmine-like fragrance, that grow on old branches.

It is the provincial tree of Chiang Rai province and is said to symbolize simplicity, endurance, advancement and peacefulness.