Pterostylis concava D.Jones & M.A.Clements 1989 SECTION Urochilus Photo by Eve Parry and her Flickr Orhcid Photo Website

Inflorescence Photo courtesy of Ron Heberle and the Thelymitra Page of The Species Orchid Society of Western Australia

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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, cool to 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 ; Native Orchids of Australia Jones 2006 as Urochilus concavus photo

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