Classification

A) Based on seed size, seed coat color and oil content:

a. Oil type:

• small black seeded varieties (8-14 mm long, 1000- seed wt: 35-75g) with high oil content (53-63%).

b. Chewing type:

• large white seeded varieties (15-28 mm long, 1000- seed wt: 100-170g) with low oil content (20-35%).

c. Intermediate type:

• intermediate seed size and oil content.

B) Based on habit of growth

a. Group I:

• having tall, unbranched single headed type with well-developed achenes.

b. Group II:

• having comparatively shorter, branched growth and with many heads.