1·The thickness of phellem, aerenchyma, diameter of vessel holes, and the number of vessels are related to the anti-waterlogging character.
木栓厚度，通气组织，管孔直径和导管数量与抗涝性相关。
2·The crystals exist in parenchyma cells of its petioles. Its petioles have big vessels and much aerenchyma.
叶柄薄壁细胞存在晶体，叶柄的导管管径比较大，有大量的通气组织。