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花生为自花受粉植物,蝶形花冠,由一片旗瓣、两片翼瓣和两片龙骨瓣组成.花冠为黄色,在旗瓣的基部,有作放射状排列的紫红色线条(下图).开花时,旗瓣和翼瓣张开,龙骨瓣紧紧地包住雄蕊和雌蕊,因此,异花受粉的可能性很小. 萼片有五,花萼基部延长而成萼管.雌蕊一枚,有子房、花柱和柱头三部分.子房柄很短,受精后5-7天,开始生长并向地弯曲,子房柄达到地面后深入土层2-8厘米处结实.雄蕊10枚,8个发育、两个退化无花药.
Peanut is a self-pollinated plant, butterfly-shaped corolla, consisting of a flag leaf, two wing petals and two keel petals. Corolla is yellow and has purple lines arranged radially at the base of the petals (below). Flowering, the flag flap and flap open, the keel tightly wrapped around the stamens and pistil, therefore, the possibility of different flowers powder is very small, sepals are five, calyx base extends into the calyx tube pistil, a Ovary, style and stigma three parts of the stalk is very short, 5-7 days after fertilization, began to grow and bend to the ground, after the sub-stalk reached the ground 2-8 cm deep soil stamens 10, 8 A development, two degenerate anthers.