1. Roots: white, stringy, with few and short lateral roots. The number, length and thickness of roots increase with the total number of leaves.

2. Stem: The stem is extremely short, spherical or oblate, solitary or clustered, with a thickness of 1-2cm, white skin, membranous and unbroken. Multilayer tubular leaf sheaths are attached to the upper part, and fibrous roots are densely distributed in the lower part.

3. Leaves: Leaves consist of leaf body and leaf sheath. The leaves are long and conical, hollow, green or dark green. The monocotyledonous sheath is cylindrical.