Head (botany)

"Flower head" redirects here. For the band, see Flowerhead.

The capitulum is considered the most derived form of inflorescence.^[1] Flower heads found outside Asteraceae (such as those of Eryngium or Jasione) show lesser degrees of specialization.

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  Diagram of a flower head. Note bracts surrounding the flowers, which would be absent on a capitulum.

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  Flower head of a common daisy (Bellis perennis)

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  Flowers open in succession in head of a sunflower (Helianthus annuus), with ray florets forming the 'petals'

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  Close up of the ray corolla of a Hieracium lachenalii; every "petal" is actually a separate five-petaled flower complete with its own stamens and making its own fruit.

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  Discoid (having only disk flowers) flower heads of a rubber rabbitbrush.

References

1. ^ Hutchinson, John (1964). The genera of flowering plants (Angiospermae). Oxford: Clarendon Press. LCCN 65-676. 

External links

Flowers of Asteraceae

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