Acer calcaratum

Acer calcaratum is in the soapberry or Sapindaceae family and is native to Yunnan (China), Sikkim (India) and to northern Indochina (Myanmar, Vietnam and Thailand). It can be a shrub or a multi-stemmed tree, reaching up to 10 m in height.

• Leaves are deciduous, simple, opposite, up to 15 cm long and 21 cm wide, with 3 deeply cut lobes with no teeth; upper surface is dark green and glabrous, lower surface pale green; petiole is 2-4 cm long.
• Species is dioecious; flowers are 5-numerous, cream to yellow.
• Winged samaras are double, spreading at an angle of near 180°, with the whole fruit being 3–4 cm wide.