(Koelreuteria annosa)
Koelreuteria is a genus of three species of flowering plants in the family Sapindaceae, native to southern and eastern Asia.They are medium-sized deciduous trees growing to 10-20 m (33-66 ft) tall, with spirally arranged pinnate or bipinnate leaves. The flowers are small and yellow, produced in large branched panicles 20-50 cm (8-20 in) long. The fruit is a three-lobed inflated papery capsule 3-6 cm long, containing several hard nut-like seeds 5-10 mm diameter.