Koelreuteria elegans
 Koelreuteria elegans more commonly known as the Taiwanese Rain Tree is a deciduous tree to 15-20 metres native to Taiwan. It is widely grown throughout the tropics and sub-tropical parts of the world as a street tree.It flowers in early to mid-summer. Flowers are small to 20 mm in length and occur in branched clusters at the stem tips. They are butter-yellow with five petals that vary in length until opening.