Emmenopterys henryi is a species of flowering plant in the Rubiaceae family. It is found in the temperate parts of central and southern China and in Vietnam. It is a deciduous tree with opposite leaves and can attain heights of 45 m and grow to be 1000 years old. The epithet is named after the Irish botanist and sinologist Augustine Henry.
Emmenopterys henryi is widely used for it's leaves in the making of herbal tea. 
I wrote that it is used in making tea, however, even after a google search, I can find no evidence this is true.  I'm not sure why it was difficult for the system. 