Bulbil

For example, some bulbous plant groups, like onions and lilies, produce bulbils in the form of a secondary, small bulb.

[1] Onion and lily bulbils meet the botanical criterion to be labeled a true bulb.

For example, other non-bulbous plant groups, like various genera within the subfamily Agavoideae, are well known to produce bulbils that do not actually meet the botanical criterion to be considered a bulb.

[2] Bulbils can develop quite quickly, many do so after the flowers die, and can persist on the inflorescence for around one to two years before falling to root in the ground.

[2] While still on the parent plant, many species develop adventitious roots and can grow to sizes ranging from 5 to 15 centimeters, if left to mature.