Platanthera calceoliformis

Platanthera calceoliformis is a species of orchid endemic to north-western Yunnan province, China.^[2] It is found at elevations of 3,200–4,000 metres (10,500–13,100 ft) in alpine grasslands.^[3] It is listed as an endangered species on the IUCN Red List.^[1]

Platanthera calceoliformis
Conservation status
Endangered  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Orchidoideae
Tribe:	Orchideae
Subtribe:	Orchidinae
Genus:	Platanthera
Species:	P. calceoliformis
Binomial name
Platanthera calceoliformis (W.W.Sm.) X.H.Jin, Schuit. & W.T.Jin[2]
Synonyms[2]
Herminium calceoliforme W.W.Sm. Smithorchis calceoliformis (W.W.Sm.) Tang & F.T.Wang

Taxonomy

The species was first described by William Wright Smith in 1921 as Herminium calceoliforme,^[2] having been collected by George Forrest in 1914 on the watershed between the Mekong and Yangtze rivers.^[4] It has been placed in several genera at different times, including the monotypic genus Smithorchis.^[3] A molecular phylogenetic study in 2014 found that it was deeply embedded in a clade of Platanthera species, and so it was transferred to that genus as Platanthera calceoliformis.^[5][2]