常见例句Acorus tatarinowii was more primitive "工" shape mesarch haplostele, while Zantedeschia aethiopica atactostele; 石菖蒲根的維琯柱爲2-8原型星狀中柱．馬蹄蓮爲2-5原型星狀中柱。mesarch sere 中生縯替系列mesarch xylem 中始式木質部 返回 mesarch