Corrections in Cotoneaster (Rosaceae) in Taiwan

In Taiwan, Cotoneaster bullatus Bois was treated as a new species, Photinia kudoi Masamune, and was identified as C. konishii Hayata. In this paper, we clarify the identity of C. bullatus Bois in the flora of Taiwan. Line drawings, color photos, and a taxonomic description are also provided in the paper. Photinia kudoi Masamune and Pourthiaea kudoi (Masamune) Masamune are designated as 2 new synonyms of C. bullatus Bois. This species, C. bullatus Bois, is similar to C. konishii Hayata, but they can be distinguished by the floweret number of the inflorescence and the shape of the leaves. Cotoneaster bullatus has biggish leaves (5~13×1.5~5.5 cm), the upper surface is conspicuously bullate, and the inflorescence is 7~21-flowered, which differ from these of C. konishii which has smaller leaves (1.3~5×1~3.5 cm), the upper surface is not bullate, and the inflorescence is 3~5-flowered (rarely ~7).