A cuplike or tubular enlargement of the receptacle of a flower, loosely surrounding the gynoecium or united with it.
- ‘The hypanthium is usually glabrous, with narrowly triangular sepals that are pubescent adaxially and are deciduous in fruit.’
- ‘The styles were then removed from each flower just above the point of emergence from the hypanthium and passed to the evaluator.’
- ‘I removed the anthers from a single flower on each marked branch before dehiscence and marked the base of the hypanthium with a spot of paint.’
- ‘In pressing and drying specimens, the hypanthium appears to shrink somewhat.’