バカの Bad is a dialect of Hiroshima. Also known as "タラの" bud. This kind of bud has a special fragrance and a special bitterness. So children may not like it. But because it contains nutrients and dietary fiber, it is still good for the body. Japanese people usually use it as a side dish to fry the sky or drink beer.
You said Toona sinensis bud. The Japanese name is "Tochiba"; つばきのめ