Classification

A) Based on maturity period

Early:

• less extensive and shallow roots,
• less number of flowers and branches.

Late:

• extensive deep penetrating roots
• more number of flowers and branches.

B) Based on seed color

White seeded:

• light colored having a smaller number of flower and branches.

Black seeded:

• dark colored having a greater number of flowers and branches.

C) Based on number of carpels in the capsule

Bicarpellatum:

• having two carpels in the capsule

Quadricarpellatum:

• having 4 carpels in the capsule

D) Based on chromosome number

Group I (2n=26):

• Sesamum indicum and Sesamum alatum

Group II (2n=32):

• prostratum and S. lacimatum

Group III (2n=64):

• radiatum and S. accidentale