Ponerorchis monantha

Ponerorchis monantha is a species of plant in the family Orchidaceae native from south-east Tibet to south-central and north-central China.
Taxonomy.
The species was first described by Achille Eugène Finet in 1902, as "Peristylus monanthus". It was later transferred to "Orchis" and to "Amitostigma". A molecular phylogenetic study in 2014, in which it was included as "Amitostigma monanthum", found that species of "Amitostigma", "Neottianthe" and "Ponerorchis" were mixed together in a single clade, making none of the three genera monophyletic as then circumscribed. "Amitostigma" and "Neottianthe" were subsumed into "Ponerorchis", with this species becoming "Ponerorchis monantha".