Abstract Cycas panzhihuaensis consists of two types of roots : 1. straight roots growing downwards with secondary growth,rays of its vascular bundle consisting of paratypic parenchyma cells;

• 摘要 攀枝花苏铁具二种类型的根: 1.；向地下生长的直根系，有次生生长，维管射线由异型薄壁细胞组成。