| Monosporic | Bisporic | Tetrasporic |
| 1. Only one of the four megaspore nuclei remain functional to form embryo sac | 1. Tow of the four megaspore nuclei remain functional to form embryo sac | 1. All the four megaspore nuclei remain functional to form embryo sac |
| 2. Undergoes three mitotic divisions to reach the 8-nucleate stage | 2. Undergoes two mitotic divisions to reach the 8-nucleate stage | 2. Undergoes only one mitotic division to reach the 8-nucleate stage |
| 3. Found in Polygonum so it is called Polygonum type | 3. Found in Allium so it is called Allium type | 3. Found in Adoxa so it is called Adoxa type |