Pumpkin flowers is a monoecious flower. The pistil and stamen are separated on two flowers, and the male and female can be distinguished from each other by the shapes of corolla, pistil and pedicel.

Pumpkin flowers is an annual creeping herb with 2-5m stems. Flowers unisexual, monoecious; Male flowers are solitary, calyx tube swollen bell-shaped, 5-6mm long, lobes strip-shaped, 10- 15mm long, pilose, upper part expanded into leaves, corolla yellow, bell-shaped, about 8cm long, 5-cleft, lobes edge rolled back, stamens 3, filaments glandular, 5-8mm long.

Female flowers are solitary, ovary 1 racehorse, short style, 3 swollen stigma, 2-lobed apex, stout fruit pedicel, ribbed, 5-7cm long, and flabellate pedicel. The shape of the fruit is diverse, and there are often longitudinal grooves outside. Seeds are numerous, oblong or oblong, grayish white. The flowering period is from June to July, and the fruiting period is from August to September.

Types of flowers

There are two types of flowers, including unisexual flowers and bisexual flowers. A flower with both stamens is called hermaphrodite, and a flower with only stamens or pistils is called unisexual. Unisexual flowers are divided into female flowers and male flowers. Flowers with only pistils are called female flowers and flowers with only stamens are called male flowers.

Both bisexual flowers and female flowers have pistils, so they can bear fruit after fertilization; However, there are only stamens in the male flower, which can not bear fruit, so it is also called a lie flower, but the stamens of the male flower can produce sperm.