1、 The difference between rhizomes

The rhizome of Phyllostachys pubescens has a diameter of 4-7 mm, the color is yellowish brown, the spacing between nodes is long, and most fibrous roots are branched. The iris rhizome is thick, 1 cm in diameter, yellow green in color, and the fibrous root is very thin and short

2、 Difference between stem and leaf

The stem of flat bamboo orchid stands upright on the ground in a flat cylindrical shape. About 10 leaves, yellow green, without obvious longitudinal veins. The stem of iris is slightly curved, the middle part is slightly wide and extends obliquely to the ground. The leaves are also yellow green, with several inconspicuous longitudinal veins

3、 The difference between petals

Flat bamboo orchid is light blue or white, with a diameter of 5-5.5 cm. The length of pedicel and bract is almost the same, and the perianth tube is 1.5 cm long. The iris is blue purple, about 10 cm in diameter, with short pedicel and slender perianth tube, about 3 cm

4、 Fruit difference

The fruit of Phyllostachys pubescens is oval, with reticular veins and 6 obvious ribs on the surface. The fruit of iris is long oval or obovate, with 6 obvious ribs