꽃은 4∼5월에 암수가 섞여 피며 액출 또는 단립성으로 나고, 과실은 가지런하지 않은 편구형이며, 모가 있고 10월에 익는다.
Flowers are produced by the mixture of male and female trees in April and May and are either effluent or monolithic, fruit is an uneven, one-sided type, cornered and ripened in October.