Orchid diversity in China:Recent discoveries

Orchidaceae are among the largest plant families of angiosperms,with approximately 750 genera and 28,500 species around the world(Chase et al.,2015).The orchids have been considered a flagship of conservation biology (Zhang et al.,2015;Fay,2018;Liu et al.,2020),and all species have been included in CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora)Appendix Ⅰ or Ⅱ.Over the last two decades,there has been major progress in the classification of Orchidaceae.An updated classification with five subfamilies and 22 tribes (including three new tribes)has been proposed (Chase et al., 2015).