百花盛开的时候,倘若你摸一摸油菜花的花心,手上准能沾上一些粉末;倘若你轻轻摇一摇一棵扬花的小树,就会有无数金黄色的粉末飘洒下来。其实,这些粉末就是花粉。花粉体形微小,用肉眼很难辨别,只有在显微镜下才能看清楚它们千姿百态的真面目:水稻和菜豆的花粉是球形的,百合和油菜的花粉是椭圆形的,椴树的花粉是三角形的…… When the flowers bloom, if you touch the flower of rape, your hands may be stained with some powder; if you gently shake a flowering tree, there will be numerous golden yellow powder drifting down. In fact, these powders are pollen. Pollen shape is small, with the naked eye is difficult to distinguish, only under the microscope to see their true colors and varied: pollen of rice and beans are spherical, pollen of lily and rape is oval, linden pollen is triangular ...