Corona
/kəˈroʊnə/
Definition
Corona refers to a crownlike floral structure found inside some flowers, formed from petal tissue, stamen tissue, or both. It is distinct from the main petals and sepals and often appears as a cup, ring, or series of scales between the petals and stamens. In daffodils, the trumpet is the corona. This structure can help shape the flower and may guide pollinators toward nectar or pollen.
Botanical Significance
- Pollinator guidance: In many flowers, a corona adds visual contrast or a landing surface that can help direct pollinators toward nectar or pollen, supporting efficient flower visits.
- Useful in identification: Its shape, size, and position are often important traits in plant identification, especially in groups such as Narcissus and Passiflora, where floral details separate similar species or cultivars.
- Part of floral specialization: A corona can be associated with specialized pollination systems, because extra floral structures may influence how insects or birds contact the flower’s reproductive parts.
- Not the same in every plant: Botanists do not treat this structure as identical across all plant groups. In different lineages, it may arise from different floral tissues, which matters in classification and comparative morphology.
Related Terms
Corolla
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Petal
Petal refers to one of the individual parts of a flower’s corolla, the inner set of leaf-like structures located just…
Perianth
Perianth is the collective term for the non-reproductive outer parts of a flower that surround the stamens and pistil…
Tepal
Tepal refers to one of the flower parts in a perianth where sepals and petals are not clearly different in size, color…
Tube
In botany, a tube is a cylindrical or hollow part formed when tissues are naturally elongated or fused into a narrow…
Throat
Throat refers to the inner opening or narrowed entrance of a flower’s corolla, the collective petals, especially in…
Palate
Palate is a raised structure or swelling on the lower lip of a bilabiate flower, especially in plants such as…
Flower
Flower is the reproductive structure of a flowering plant, usually containing stamens, which produce pollen, and one or…