Begonia pingxiangensis, a new species of Begonia sect. Coelocentrum (Begoniaceae) from Guangxi, China

Begonia pingxiangensis, a new species from Guangxi, China, is described and illustrated. The new species resembles B. daxinensis in the leaf blade and flower, but can be distinguished by its leaf blade shape (ovate to broadly ovate vs obliquely ovate to suborbicular), size (4-8 x 3-7 cm vs 10-24 x 10-17 cm), flower color (white vs white or pinkish), smaller staminate flower (outer two 5-8 x 6-10 mm, inner two ca. 3-4 x 2 mm vs outer two 12-19 x 10-16 mm, inner two 12-14 x 4-5 mm) and pistillate flower (outer two tepals 7-8 x 8-10 mm, inner one 3-4 x 2 mm vs outer two tepals 10-15 x 10-12 mm, inner one 5-7.5 x 2-5 mm) sizes.