(Kraenzl.) X.H.Jin, Schuit. & W.T.Jin
The species was described by Joseph Dalton Hooker in 1890, under the name "Habenaria secundiflora". However, this name had already been used for a different species in 1881, so was illegitimate. The species was first legitimately named in 1898 by Friedrich Kraenzlin as Peristylus secundiflorus. It was later transferred to Gymnadenia and then to Neottianthe. A molecular phylogenetic study in 2014 found that species of Neottianthe, Amitostigma and Ponerorchis were mixed together in a single clade, making none of the three genera monophyletic as then circumscribed. Neottianthe and Amitostigma were subsumed into Ponerorchis, with this species becoming Ponerorchis secundiflora.
- "Ponerorchis secundiflora", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2018-03-17
- "Plant Name Details for Habenaria secundiflora", The International Plant Names Index, retrieved 2018-03-31
- Jin, Wei-Tao; Jin, Xiao-Hua; Schuiteman, André; Li, De-Zhu; Xiang, Xiao-Guo; Huang, Wei-Chang; Li, Jian-Wu & Huang, Lu-Qi (2014), "Molecular systematics of subtribe Orchidinae and Asian taxa of Habenariinae (Orchideae, Orchidaceae) based on plastid matK, rbcL and nuclear ITS", Molecular Phylogenetics and Evolution, 77: 41–53, doi:10.1016/j.ympev.2014.04.004
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