Acer crassum is an uncommon Asian species of maple. It has been found only in the Province of Yunnan in southwestern China.
Acer crassum is a small tree up to tall. Leaves are non-compound, thick and leathery, lance-shaped, up to long and across, no lobes or teeth.
References
External links line drawing for Flora of China, figure 571, drawings 1 + 2 at top