Platanthera calceoliformis (W.W.Sm.) X.H.Jin, Schuit. & W.T.Jin, Molec. Phylogen. Evol.

Abstract, Prasad K. & Rich., Platanthera, 2023, The genus Platanthera (Orchidaceae) in India with two new species, Rheedea 33 (2), pp. 31-52 : 45

Platanthera calceoliformis (W.W.Sm.) X.H.Jin, Schuit. & W.T.Jin, Molec. Phylogen. Evol. 77: 51. 2014. Herminium calceoliforme W.W.Sm. , Notes Roy. Bot. Gard. Edinburgh 13: 211. 1921. Smithorchis calceoliformis (W.W.Sm.) Tang & F.T.Wang, Bull. Fan Mem. Inst. Biol., Bot. 7: 140. 1936. Lectotype (designated by Efimov, 2016): CHINA, Yunnan, Mekong-Yangtze divide, Kari Pass, 10000 ft., August 1914, Forrest 13110 (E [E00381991 digital image]; isolecto E [E00381992 digital image!]).

Distribution: India and China.

Notes: This species is known from India by only a single collection from Bungerong (Sikkim) by Pantling (Pantling 341, P). Pantling gave the field number 341 to many specimens collected in different seasons and are deposited in different herbaria. The herbarium specimen deposited at P is clearly Platanthera calceoliformis ( Efimov, 2016) . Molecular phylogenetics has shown that the monotypic genus Smithorchis ( S. calceoliformis ) is nested in the Platanthera clade, making it paraphyletic ( Jin et al., 2014). However, Jin et al. (2017) included Smithorchis in Platanthera in order to make Platanthera monophyletic.