Pterostylis concava D.Jones & M.A.Clements 1989 SECTION Urochilus Photo by © Eve Parry and her Flickr Orhcid Photo Website
Inflorescence Photo by Ron Heberle and the Thelymitra Page of The Species Orchid Society of Western Australia
Common Name The Concave Pterostylis - The Pouched Greenhood
Flower Size .42" to .6" [1.1 to 1.5 cm]
The flower on the left is P concava. Found in Western Australia at elevations of 100 to 350 meters in open forests and woodlands as a small to medium sized, cold growing terrestrial orchid with a basal rosette of 4 to 8 leaves on the non-blooming plant and blooming in the winter and spring with several, linear, twisted, basally clasping, acute leaves all along the blooming, 7 to 18" [17 to 45 cm] long, stem carrying 1 to 13 flowers.
Synonyms Oligochaetochilus concavus (D.L.Jones & M.A.Clem.) Szlach. 2001; Pterostylis vittata var. subdifformis Nicholls 1933; Urochilus concavus (D.L.Jones & M.A.Clem.) D.L.Jones & M.A.Clem. 2002
References W3 Tropicos, Kew Monocot list , IPNI ;
Orchids of Australia Nicholls 1969 as P vittata var subdifformis drawing fide; Native Orchids of Australia Jones 2006 as Urochilus concavus photo
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