The phloems rage alternate with xylems. There are mucus cells and crystal cells in cortex of root. And vascular bundles scatter in stem.
鸭跖草的木质部为六原型，韧皮部与木质部相同排列，根皮层中分布有粘液细胞和晶体细胞。
2
Adonis amurensis is perennial herb, Its roots are nearly primary structure in the whole life, Primary Xylems of main root and lateral roots of one year seedling are diarch.