Discoid

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In the Composite family, a type of flower head that contains only rayless florets.  In discoid flower heads, ray florets and ligulate florets are absent.  Disc florets are typically bisexual and fertile, or less commonly, may be staminate only.

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Above:   Flower head with bisexual disc florets.

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Above:  Flower heads with unisexual (staminate) florets.
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