Alangium confertiflorum Y.H.Tan & H.B.Ding, a new species of Alangium section Alangium (Cornaceae) from China-Laos transboundary region, is described and illustrated here. The similarities and differences with closest allied species in the section Alangium, A. amplum W.J.de Wilde & Duyfjes and A. indochinense W.J.de Wilde & Duyfjes are discussed. The new species is assessed as Endangered (EN) following the IUCN Red List Categories and Criteria.