Common name: Mitchell's Rustyhood
Pterostylis mitchellii Lindl. APNI*
Synonyms: Oligochaetochilus mitchellii (Lindl.) Szlach. APNI*
Pterostylis gibbosa subsp. mitchellii (Lindl.) Blackmore & Clemesha APNI*
Scape to 30 cm tall, with 2–7 bracts bearing 1–7 flowers. Galea curved for all its length, 23–25 mm long including the upturned filiform point which is 8–10 mm long. Dorsal sepal green with translucent spaces; petals terminating where the dorsal sepal begins to turn upward, 12–13 mm long by 5 mm wide when dissected and pressed, with translucent light brown shading and one or two striations. Lateral sepals 16–18 mm long by 5 mm wide when pressed, united for around one quarter their length then gradually contracted into filiform caudae, finely filiform for half their length, light brown to greenish brown in the centre. Labellum on an irritable claw, margins slightly upturned forming a wide shallow channel, deep red-brown, broad lanceolate, 6.0 mm long by 2.5 mm wide, set almost 1 mm above the appendage and darkest at the base of the lamina (sometimes making it appear as if there is a hole at this point). Midrib inconspicuous and forming a slight ridge in the anteriorthird. Setae marginal, 12–16, longest pair at the base, appendage reduced to a basal swelling, flat, bluntly obtuse with about 10 erect setae.
Flowering: August to November
Distribution and occurrence:
NSW subdivisions: NWS, NC
Other Australian states: Qld
South-eastern Queensland and northern New South Wales between Rockhampton and Newcastle, including coast and inland areas.
Text by Matt A.M. Renner (28 Jan 2019) based on Blackmore and Clemsha (1968)
Taxon concept: Blackmore JAP, Clemsha SC (1968) A review of the so-called "Rufous Group" of the genus Pterostylis. The Orchadian 2(12): 148–166.
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.