Begonia fimbristipula Hance subsp. siamensis Phutthai & S.Radbouchoom subsp. nov. A habitat B habit C tuber globose C’ tuber sub-elongate D peduncle E petiole F leaf adaxial and abaxial surface F’ close-up of white spots on adaxial surface of leaf G close-up of trichome on adaxial surface of greenish leaf G’ close-up of trichome on abaxial surface of leaf H close-up of abaxial surface of reddish leaf H’ close-up of abaxial surface of reddish leaf I staminate flower visualised using face view, side view, back view J pistillate flower visualised using face view, side view K fruit L cross sections of young ovary in the sequence top, middle and bottom.