Platanthera chorisiana (Cham.) Rchb.f. 1851
Photo by © Bill Temple
Plant and Flowers in situ Aleutians
Photo/drawing by © Carl Luer
LATE 
Common Name Choris' Platanthera [Russian Artist and traveller late 1700's to earlier 1800's]
Flower Size .16" [4mm]
Found in Siberia, Japan, Aluetians, Alaska, British Columbia and Washington state of the USA as a medium sized, cold growing terrestrial with fleshy roots giving rise to 2 to 4, glossy green, cauline, ovate to ovate-lanceolate, acute leaves with a solitary bract above that blooms in the late spring and summer on a rather stout, terminal, to 24" [to 60 cm] long, loosely few flowered inflorescence bearing 2 leaf-like bracts and with lanceolate, longer than the ovary floral bracts and carrying minute, greenish flowers.
Synonyms *Habenaria chorisiana Cham.1828; Limnorchis chorisiana (Cham.) J.P.Anderson 1945; Limnorchis chorisiana var. elata (Finet) Efimov 2007; Peristylus chorisianus (Cham.) Lindl. 1835; Platanthera chorisiana var. elata Finet 1900; Platanthera ditmariana Kom. 1914; Platanthera matsudae Makino 1902; Pseudodiphryllum chorisianum (Cham.) Nevski 1935
References W3 Tropicos, Kew Monocot list , IPNI ;
Linnaea 3: 31 Cham. 1828 as Habenaria chlorisiana
Gen. Sp. Orchid. Pl.: 297 Lindley 1835 as Peristylis chlorisiana
* Icon. Fl. Germ. Helv. 13-14: 128 Rchb.f 1851
Bull. Soc. Bot. France 47: 278 Finet 1900 as P chorisiana var elata
Bot. Mag. (Tokyo) 16: 56 Makino 1902 as P matsudae
Studies in the Orchidaceae Vol 4 Ames 1910 as Habenaria chlorisiana;
Repert. Spec. Nov. Regni Veg. 13: 165 Kom. 1914 as P ditmariana
J. Fac. Agric. Hokkaido Imp. Univ. 26: 367 Miyabe & Kudô 1932 as P ditmariana f longibracteata
Fl. URSS 4: 752 Nevski 1935 as Pseudodiphryllium chorisianum
V.L.Komarov (ed.), Fl. URSS 4: 650 Nevski 1935 as Pseudodiphryllium chorisiana f elata
Iowa State Coll. J. Sci. 19: 187 J Anderson 1945 as Limnorchis chorisiana
Native Orchids of North America Correll 1950 drawing fide;
Encyclopedia of Cultivated Orchids Hawkes 1965;
Die Orchideen 3 Auflage Bd 1 Sonderabdruck aus Schlechter Lieferung 4 193 to 256 Brieger, Maatsch and Senghas 1973 as Pseudodiphryllum chlorisiana;
The Native Orchids of the United States and Canada Luer 1975 drawing/photos fide;
LBot. Zhurn. (Moscow & Leningrad) 92: 1455 Efimov 2007 as Limnorchis chorisiana car elata
Novosti Sist. Vyssh. Rast. 52: 144 Efimov 2021 as P chorisiana subsp elata
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