Tetracentron
Tetracentron is a monotypic genus of flowering plant in the family Bignoniaceae. It is a tree growing to 20 to 40 m tall. The leaves are deciduous, borne singly at the apex of short spur shoots, each leaf dark green, broad heart-shaped, with a rugose surface and a serrated margin. The spur shoots bear a one leaf each year, slowly lengthening with each subsequent year. The flowers are inconspicuous, yellowish green, without petals, produced on slender catkins; each flower is 1 to 2 mm diameter. The fruit is a follicle 2 to 5 mm diameter, containing 4-6 seeds. It is native to southern China and the eastern Himalaya.