disciform head

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disciform head

plant anatomy

Learn about this topic in these articles:

Asteraceae

In Asteraceae: Flowers
The disciform head, a special derivative of the radiate type, resembles the discoid head in lacking the marginal rays, but the outer flowers are pistillate, with a tubular, rayless corolla. Plants of the genus Gnaphalium (cudweed) have disciform heads. Some varieties of a species, such as…
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