A sterile or abortive stamen, frequently resembling a stamen without its anther.
- The cocoa flower has five free sepals, five free petals, five staminodes, five stamens and an ovary of five united carpels.
- In abnormal male flowers, stamens develop as carpelloid structures, whilst in abnormal female flowers, the staminodes (vestigial stamens) develop as pseudocarpel structures.
- Pistillate flowers have the same perianth but the number of parts is more variable; staminodes are well developed with or without a rudimentary anther.
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