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Compositae

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Compositae

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In the compositae capitulum the yellow central disc is a mass of fertile flowers, while the petals around the outside indicate the presence of a ring of infertile flowers. The flowers belong to the brachycome Brachycome multifida from Australia.
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The common dandelion Taraxacum officinale, growing on a roadside. Dandelions are very complex genetically and hundreds of distinct forms have been described from the northern hemisphere. Australia has two species, one of which also occurs in South America.

Daisy family, comprising dicotyledonous flowering plants characterized by flowers borne in composite heads (see capitulum). It is the largest family of flowering plants, the majority being herbaceous. Birds seem to favour the family for use in nest ‘decoration’, possibly because many species either repel or kill insects (see pyrethrum). Species include the daisy and dandelion; food plants such as the artichoke, lettuce, and safflower; and the garden varieties of chrysanthemum, dahlia, and zinnia.



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? Mentioned in ? References in classic literature
 
These differences have been attributed by some authors to pressure, and the shape of the seeds in the ray-florets in some Compositae countenances this idea; but, in the case of the corolla of the Umbelliferae, it is by no means, as Dr.
 
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