Onion is a perennial herb of the family Liliaceae and Allium. Bulbs are thick and nearly globose; papery to thin leathery, endothelial hypertrophy, fleshy, cylindrical leaves, hollow, thickest below the middle, tapering upward, shorter than scape, scape thick, up to 1 meter high, umbrella Inflorescences globose, with many and dense flowers; pollen white; perianth segments with green midribs, oblong ovate, filaments equal in length, ovary subglobose, hollow honeycomb with curtain at base of ventral suture; 5-7 Flowering month.