discoid head

plant anatomy

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June 25, 2026

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A discoid head in plant anatomy refers to a type of flower head that has only disk flowers, lacking ray flowers. This arrangement makes the entire inflorescence resemble a single flower. This characteristic is notably found in the Asteraceae family, which is part of the Asterales order. The Asteraceae family is known for its numerous species, many of which are herbs found in temperate and subtropical regions. A key feature of this family is how their flowers are grouped into compact heads, which can sometimes look like individual flowers.12

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Asteraceae
Flowers
The simplest type is the discoid head, in which the flowers have a regular, tubular corolla, with generally four or five apical teeth representing the tips of the petals. This kind of flower is called a disk flower. Ordinarily, the flowers in a discoid head are all perfect (bisexual) and…
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The simplest type is the discoid head, in which the flowers have a regular, tubular corolla, with generally four or five apical teeth representing the tips of the petals. This kind of flower is called a disk flower. Ordinarily, the flowers in a discoid head are all perfect (bisexual) and…
Read More