Begonia tenuifolia is a species of flowering plant in the family Begoniaceae, native to Sumatra, Java, and the Lesser Sunda Islands.

[1] A tuberous geophyte of the seasonally dry tropics, it has variable leaf patterning and coloration.

The leaves of young plants are round, with mature plants having narrow, ovate leaves.

The seeds are dispersed by a splash cup structure.

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