CLASSIFICATION

• Kingdom – Plantae
• Division – Angiospermae
• Class – Monocotyledonae
• Order – Liliales
• Family – Liliaceae
• Genus – Allium
• Scientific name – Allium cepa
  
  

IMPORTANT POINTS

• Onion consist of both aerial and underground stem.
• The underground stem is highly reduced into a condensed disc shaped structure called Bulb.
• The scale leaves arising from the bulb are modified to store food and become fleshy.
• The fleshy scale leaves are surrounded by a thin papery outer scale called Tunic that prevents it from drying out. This type of bulb is called Tunicated bulb