The capitulum is considered the most derived form of
inflorescenceAn inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
. Flower heads found outside
AsteraceaeThe family Asteraceae or Compositae is the second largest family of flowering plants, in terms of number of species....
(such as those of
EryngiumEryngium is a genus in the family Apiaceae of about 230 species of annuals and perennials with hairless and usually spiny leaves, and dome-shaped umbels of flowers resembling those of thistles. The genus has a cosmopolitan distribution, with the centre of diversity in South America. Some species...
or
JasioneJasione is a genus of flowering plants within the family Campanulaceae which are native to Europe.Species include:* Jasione amethystina* Jasione bulgarica* Jasione crispa* Jasione echinata* Jasione foliosa...
) show lesser degrees of specialization.
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The capitulum is considered the most derived form of
inflorescenceAn inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
. Flower heads found outside
AsteraceaeThe family Asteraceae or Compositae is the second largest family of flowering plants, in terms of number of species....
(such as those of
EryngiumEryngium is a genus in the family Apiaceae of about 230 species of annuals and perennials with hairless and usually spiny leaves, and dome-shaped umbels of flowers resembling those of thistles. The genus has a cosmopolitan distribution, with the centre of diversity in South America. Some species...
or
JasioneJasione is a genus of flowering plants within the family Campanulaceae which are native to Europe.Species include:* Jasione amethystina* Jasione bulgarica* Jasione crispa* Jasione echinata* Jasione foliosa...
) show lesser degrees of specialization.