| The carpellate flower is composed of a single carpel with an elongated, grooved style. |
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| Begonia sabahensis and B. calcarea are closely allied species with orange and yellow flowers respectively, borne on separate umbellate staminate and unifloral carpellate inflorescences. |
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| Begonia piring has paired carpellate flowers with 5 tepals borne beneath a larger staminate inflorescence and hence is likely affiliated with Begonia sect. |
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| Aging flowers along the indeterminate racemes shift from being staminate to carpellate. |
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