Ascoglossum, abbreviated as Ascgm in horticultural trade, is a monotypic genus of epiphytic orchids in family Orchidaceae. Its only species Ascoglossum calopterum is endemic to Dinagat Island in the southern Philippines. Its growth is similar to Renanthera. Ascoglossum forms several different intergeneric hybrids (nothogenera): One of the RHS-registered primary hybrids is Ascoglossum Nina Rach (Ascoglossum purpureum × Renanthera monachica).