1、 Leaf difference

The leaves in front of the cart are wide oval or oval, the top of the leaves is very round, the edges of the leaves are wavy or irregularly serrated, and the petioles of its leaves will be longer than the leaves

The leaves in front of the flat car are paper, oval, ovate lanceolate or elliptic lanceolate, and the base of the leaves is sheath shaped

2、 Fruit difference

The capsule in front of the cart is oval and brown or tan in color

The capsule in front of the flat car is oval or conical oval, the seed is oval, the ventral surface is flat, and the color is yellowish brown or black

3、 Flower difference

The flowers in front of the cart are dense, and the bracts of the flowers are oval, with green keel like protrusions

The stem of the inflorescence in front of the flat car has stripes, grows white pubescence, and the spike inflorescence is thin cylindrical