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(四)花1.花的功能花是植物的繁殖器官,经过传粉受精以后即能结果实种子,以繁延后代。花不像营养器官一样长期的存在植物体上,它只是在一定时期生出。例如辛夷,款冬是在春天,忍冬、槐花是在夏天,菊花是在秋天;又二年生植物如白菜、萝卜等必须到第二年才开花;更有一些多年生植物几年后才开花,俗话说:「桃三杏四」,即指的是桃需要生长到第三年,杏需要生长到第四年才开花结果。植物在开花前营养器官的生长发育以及制造并储藏养分都给开花结实准备了条件,无论植物开花早晚或久暂,一旦花开,即全力供应,以达到结果实种子繁延后代的目的.2.花的形态(图一)
(d) Flower 1. Flower The flower is the reproductive organ of the plant. After pollination and fertilization, the seed can be fruited to prolong the generation. The flower does not exist on the plant body as long as the vegetative organ, and it is only produced in a certain period of time. For example, Magnolia, coltsfoot is in spring, honeysuckle, silk flowers are in summer, chrysanthemum is in autumn, and biennial plants such as cabbage, radish, etc. must bloom until the second year; some perennial plants only flower after several years, as the saying goes. : “Tao San Xing Xing 4” means that the peach needs to grow to the third year, and apricot needs to grow until the fourth year to bloom. The growth and development of vegetative organs and the production and storage of nutrients before flowering of plants all provide conditions for flowering and fruiting. Whether the plants bloom sooner or later or for a long time, once the flowers are blossomed, they are fully supplied to achieve the purpose of seeding and prolonging the offspring.2 The shape of the flower (Figure 1)