Description

Onions are a vegetable with tender tubular leaves, and their bases are greasy under the soil surface, and their function is to store food materials. They have a disc-shaped stem, and below the bases of the greasy leaves they end in fibrous roots. At the end of the vegetative growth season, a spike emerges from it, bearing at its end an inflorescence consisting of several star-shaped, white flowers. Onions have a distinctive, pungent smell, due to the abundance of sulfurous materials in them.