常见例句Acorus tatarinowii was more primitive "工" shape mesarch haplostele, while Zantedeschia aethiopica atactostele; 石菖蒲根的维管柱为2-8原型星状中柱．马蹄莲为2-5原型星状中柱。mesarch sere 中生演替系列mesarch xylem 中始式木质部 返回 mesarch