1. The body of the specimen is divided into anterior and posterior parts, unbranched and linear.
2. Body cells are small and cylindrical and arranged in rows.
3. Cells are attached to each other to form filaments.
4. The cells are barrel-shaped and wider than they are long.
5. The cell at the foot of the sutra is slender, long and colorless. This is called holdfast.
6. The cell at the tip of the sutra is slightly rounded. This is called precursor cell.
7. Each cell contains a girdle or belt and a cup or ring-shaped chloroplast.
8. Multiple pyrenoids exist in chloroplasts.
9. Each cell has a nucleus.