Illustration of Begonia giganticaulis D.K.Tian & W.G.Wang, sp. nov. (Drawn by Mr. Zhi-Min Li) A male flowering branches B female flowering branches C main stem line spots, much expanded node and internode base D expanded node and internode base on small upper branches E leaf blade F leaf (abaxial), showing sparse hairs on veins G stipule H staminate flowers I, J pistillate flower K side view of androecium L stamens M ovary and stigmas N fruit O dissection of ovary showing placentae.