Begonia kui (sect. Coelocentrum, Begoniaceae), a new species from Vietnam

Begonia kui, a new species of sect. Coelocentrum, is described and illustrated. Begonia kui is somewhat similar to B. variegata Y. M. Shui & W H. Chen, differing in the leaf apex obtuse or rounded (vs. shortly acuminate); leaf margin with a white maculation (vs. with a dark brown band); inflorescences pilose (vs. glandular-hispid); outer tepals pinkish or reddish (vs. greenish or greenish-yellow), abaxially shortly pilose (vs. glandular-hispid); androecium zygomorphic or nearly so (vs. actinomorphic); and ovaries and fruits glabrous (vs. glandular-hispid). Begonia kid is available from floral markets in northern Taiwan, possibly originated from Thai Nguyen Province in northern Vietnam