Acer calcaratum

Acer calcaratum is an Asian species of maple found in Yunnan and northern Indochina (Myanmar, Thailand, Vietnam). It is very rare in China.
"Acer calcaratum" is a small tree up to 7 meters tall. Leaves are non-compound, the blade up to 15 cm long and 21 cm wide, with 3 deeply cut lobes but no teeth.