Disc floret

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In the Asteraceae, a small, slender, tube-shaped or vase-shaped, rayless flower located within the central portion of a composite flower head. Corollas of disc florets are typically 5-parted, the 5 "petals" are fused (united) for all or part of their length toward the base. The unfused, upper portions of the "petals" are termed "lobes". Disc florets are commonly either unisexual or bisexual, but may sometimes be sterile.