Begonia x breviscapa (Begoniaceae), a new intersectional natural hybrid from limestone areas in Guangxi, China.

摘要

A new natural hybrid, Begonia x breviscapa C.-I Peng, Yan Liu & S. M. Ku, from northwestern Guangxi, China, is described and illustrated. A somatic chromosome number of 2n=30 was determined. Based on morphological features, geographical range, pollen stainability and seed set we conclude that B. x breviscapa is a natural hybrid between B. variifolia Y. M. Shui & W. H. Chen [sect. Coelocentrum Irmsch.] and B. leprosa Hance [sect. Leprosae (T. C. Ku) Y. M. Shui]. This is the first documentation of natural hybridization between begonias of two different sections in mainland China.