“十月怀胎,一朝分娩”。说的是人类繁衍后代,受精卵必须在母体内发育成婴儿,才能呱呱坠地,离开母体独立成长。动物界的哺乳动物也都是胎生的。而植物界的被子植物却是另一番景象,它们开花、结果、果熟蒂落,然后种子再在适宜的条件下萌发,长成幼苗。以上都是人们所知道的。如果说植物也有胎生的,似乎有些新奇。 “October pregnancy, delivery.” It is said that human fertile generations, the fertilized eggs must develop into infants in the mother’s body, can fall to the ground, leaving the mother to grow independently. Animals in the animal kingdom are also born. The angiosperms of the plant kingdom are another scene. They bloom, fruit and ripe, and then the seeds germinate under suitable conditions and grow into seedlings. All of these are known to people. If plants are born, it seems strange.