Catalpa ovata
Catalpa ovata, the yellow catalpa or Chinese catalpa, is a pod-bearing tree native to China. Compared to C. speciosa, it is much smaller, typically reaching heights between. The inflorescences form bunches of creamy white flowers with distinctly yellow tinging; individual flowers are about wide. They bloom in July and August. The leaves are very similar in shape to those of Paulownia tomentosa, having three lobes, and are darkly green. Fruits are very narrow, foot-long pods.
Although native to the more temperate provinces within China, C. ovata is also cultivated in North America and Europe, and has become a parent of Catalpa × erubescens with the American species Catalpa bignonioides. It is commonly used to make the undersides of qin.