Introduction to rape flowers: Rapeseed is also called "brassica". Brassicaceae, Brassica genus. Brassicaceae belongs to the class Dicotyledon. Annual or perennial herbs. The basal leaves are spirally stacked, and the stem leaves are usually alternate and have no stipules. The flowers are bisexual, radially symmetrical, with four petals arranged in a cross shape. There are usually 6 stamens, 4 long and 2 short, usually called the "four strong stamens". In March and April, flowers bloom on the stem tips in racemes with four yellow-green calyxes and four-petal yellow corolla in the shape of a cross. The fruit is a silique. In summer, when mature, it splits and releases seeds, which are purple-black or yellow. Rapeseed has become an important crop for full utilization of land and economic development due to its wide adaptability, cold resistance, drought tolerance and low soil requirements. It can be used for seed clearing, interplanting, and seedling transplanting.