一、花的种类和花序植物的种类繁多,花朵的构造差异十分悬殊。有些植物的花,具有花萼、花冠、雄蕊和雌蕊,这些花叫完全花。而另有一些植物则不是这样,它们的花,并不全具有花萼、花冠、雄蕊和雌蕊四个部分,而是在发育过程中缺少1个或几个部分,这样的花,我们就叫做不完全花。很多植物的花,花萼与花冠排成内外两轮,它们的形状、大小和颜色也彼此不同,这种花叫双被花,例如油菜、蚕豆、棉花和桃的花就是双被花。有些植物的花,只有一轮花被,大多数只有花萼而无花冠,如大麻、 First, the types of flowers and inflorescences of a wide variety of flowers, the structural difference is very poor. Flowers of some plants, with calyx, corolla, stamens and pistils, these flowers are called complete flowers. And some other plants are not like this. Their flowers do not all have the four parts of calyx, corolla, stamens and pistils. Instead, they lack one or several parts in their development. Such flowers are called imperfect flower. The flowers, calyxes and corolla of many plants are arranged in two rounds inside and outside. Their shapes, sizes and colors are also different from each other. The flowers are double flowers such as rape, fava bean, cotton and peach flowers. Some plant flowers, only a round of perianth, most of them only calyx without corolla, such as cannabis,