Success in obtaining an interspecific hybrid between B. pekinensis and B. oleracea var. acephala was possible through the use of the Chinese cabbage as the seed parent and the use of the growth regulator, N-m-tolylphthalamic acid. The hybrids appeared vegetatively intermediate between the parents except for the inflorescence which appeared more like the kale parent. The F1 was backcrossed with ease to the Chinese cabbage parent using the hybrid either as the pollen or seed parent. No backcross was made to the kale parent. Segregation in the F2 was continuous for most characters studied.