≡ Chamaeanthus averyanovii Vuong, Kumar, V.H. Bui & V.S.Dang in Pham et al. (2021: 132, fig. 1).
Type:— VIETNAM. Son La Province: Thuan Chau District, 18 June 2021, Truong Ba Vuong, Bui Van Huong, BV 1194 (VNM 00069908).
Notes:—We can not see any fundamental differences between Biermannia King & Pantling (1897: 591) and Chamaeanthus Schlechter ex J.J. Smith (1905: 552) except for insufficient variation on the length of the column foot. Following Seidenfaden & Wood (1992), we consider these genera congeneric and use here earlier valid name. Data on ecology, phenology, distribution, and conservation status for this species were reported earlier (Pham et al. 2021).