Manglietia admirabilis Y. H. Law & R. Z. Zhou, a new species from Yunnan, China, is described and illustrated. It is closely related to M. grandis Hu & W. C. Cheng and M. dandyi (Gagnep.) Dandy, having a similar habit and vegetation. Manglietia admirabilis differs in its prominently lenticellate branches. Its leaves are dark green, abaxially ferrugineous pubescent, and are relatively small in size (16–24 × 9–10 cm). The new species is distinguished by its combination of white tepals, red stigmas, red and glabrous stamens, and relatively few carpels (28 to 40).