#bulb  a modified bud consisting of a thickened globular underground stem serving as a reproductive structure
  supertype:  #stalk__stem  a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
  subtype:  #onion.bulb  edible bulb of an onion plant
  subtype:  #shallot.bulb  aggregated bulb of the multiplier onion
  subtype:  #squill  bulb of the sea squill, which is sliced, dried, and used as an expectorant
  subtype:  #bulbil__bulblet  small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers

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