kœlreuteria

from The Century Dictionary.

• noun A genus of ornamental Chinese trees with bladder-like fruit, belonging to the natural order Sapindaceæ, and type of Radlkofer's tribe Kæl-reuterieæ, distinguished by its 5 valvate sepals, 3 to 4 spreading petals, inflated loculicidal capsule, pinnate leaves, and ample, terminal, many-flowered, branching panicles of yellow flowers.