The type of stomata of 12 species of Iris is diacytic type, stomata is randomly distributed.Guard cells are parallel to leaf veins where no stomata distribute.

• 12种鸢尾的气孔类型均属于横列型，且气孔均是随机分布，气孔保卫细胞的长轴与叶脉平行,叶脉处无气孔分布。