三种甘草维管组织在下胚轴、子叶节区内的排列形式及变化规律一致，但不同的种维管组织排列成不同形式所经过的距离有所不同。下胚轴是根和子叶间维管组织转变的过渡区，而根的初生维管组织与上胚轴的维管组织无直接的联系。在过渡区内外始式的木质部经过后生木质部分离、拉开呈一条直线的过程，然后在子叶节区靠合形成子叶的内始式木质部。在子叶节区子叶迹分化完成，上胚轴维管组织开始分化，同时在子叶迹与上胚轴维管组织之间有芽的分化。 The arrangement of three kinds of licorice vascular tissues in hypocotyls and cotyledonary node was the same as that of other licorice tissues. However, the distance of different kinds of vascular tissues arranged in different forms was different. Hypocotyls are the transitional area between the root and the cotyledons, while there is no direct relationship between the primary vascular and root hypocotyls. In the transitional region, the external xylem is separated from the xylem and then opened in a straight line. Then, the inner xylem of the cotyledon is formed at the cotyledon node. In the cotyledonary node cotycleral differentiation is completed, the hypocotyl vascular tissue began to differentiate, while in the cotyledons and hypocotyl vascular tissue bud differentiation.