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Hypanthium  [ Botany ]

Dictionary of botanic terminology - index of names

Synonym: Floral cup,  Floral tube, Pericarpel
  A tubular structure of a flower formed by the fusion of the basal portions of the sepals, petals, and stamens, and from which the rest of the floral parts emanate.  
Hypantium is also called a floral cup or floral tube. It is a  flat, cuplike, or tubular structure on which are included the sepals, petals, and stamens - often above the top of the ovary - with the fused bases of lower portions of stamens and perianth parts inserted on the rim or on a modified receptacle (contain stem tissue from the receptacle). ( e.g. the flower and fruit of Cactaceae (false berry) or the fruit of the apple (pome) where the pulp we eat is the thickened, fleshy hypanthium fused with the inner ovary wall)

Left: A flower of Opuntia







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