楸（学名：Catalpa bungei）是紫葳科梓属的植物。

落叶乔木，高达30米；树干端直；三角状卵形叶子三枚轮生，全缘或3－5裂，无毛；夏季开白色两唇形花，内有紫斑，总状花序顶生；蒴果细长。

Catalpa bungei, commonly known as Manchurian catalpa, is a species of catalpa native to China. The specific epithet honors the botanist Alexander Bunge, who collected the specimens that Carl Anton von Meyer later described. The flowers are arranged in a corymb and are densely spotted with pink. It is cultivated in China, along with C. ovata, for its wood (known as "qui wood" or "chu wood") and as an ornamental tree.