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