Xylosma congesta, commonly known as shiny xylosma, is a species of flowering plant in the family Salicaceae, native to East Asia. Originally described in 1790 as Croton congestus, the species was later reassigned to Xylosma in 1919. The plant is used medicinally, and is widely grown ornamentally for its dense growth habit and shiny foliage, but its introduction to the United States has led to its emergence as a potential invasive species. Xylosma congesta is also known as dense logwood and zuo mu (Chinese: 柞木), and it has a conservation status of least concern on the IUCN Red List.
