Acer pentaphyllum (五小叶枫 wu xiao ye feng) is a very rare, endangered maple species endemic to southwestern Sichuan in China, at altitudes of 2300–2900 meters. Acer pentaphyllum is a deciduous tree that grows to 10 meters in height. Leaves are palmately compound hairless, usually with 5 lobes but sometimes with 4 or 7. Leaflet are 5-8 × 1.5–2 cm, narrowly lanceolate or lanceolate.