|Taiwanese rain tree with fruit|
Koelreuteria formosana Hayata
Koelreuteria elegans, more commonly known as Flamegold rain tree or Taiwanese rain tree, is a deciduous tree 15–17 metres tall endemic 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. Each flower contains seven to eight pale yellow stamens with hairy white filaments.
The fruit is a brown-purplish three-lobed capsule that splits to reveal a number of black seeds.
- "Koelreuteria elegans". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 29 May 2015.
- Huang, Tseng-chieng, ed. (1996). "Sapindaceae". Flora of Taiwan. 2 (2nd ed.). Taipei, Taiwan: Editorial Committee of the Flora of Taiwan, Second Edition. p. 588. ISBN 957-9019-52-5. Retrieved 30 July 2017.
- Nianhe Xia; Paul A. Gadek. "Koelreuteria elegans". Flora of China. Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. Retrieved 30 July 2017.
- K. T. Shao (ed.). "Koelreuteria henryi Dummer, 1912". Catalogue of life in Taiwan. Biodiversity Research Center, Academia Sinica, Taiwan. Retrieved 30 July 2017.
- "Weed Management Guide: Chinese rain tree – Koelreuteria elegans ssp. formosana" (PDF). CRC for Australian Weed Management. 2003. Archived from the original (PDF) on 2007-09-01.