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Pterostylis cobarensis M.A.Clem.
Family Orchidaceae
Common name: Cobar Rustyhood

Pterostylis cobarensis M.A.Clem. APNI*

Synonyms: Oligochaetochilus cobarensis (M.A.Clem.) Szlach. APNI*

Description: Terrestrial herb.

Rosette leaves 7–11, narrow-elliptic, 1.5–2.5 cm long, 5–8 mm wide, margins entire.

Scape to 40 cm high, with 3–5 closely sheathing stem leaves. Flowers 3–8, c. 1.2 cm long, semi-erect, transparent with brown and green, markings and suffusions. Dorsal sepal with an upcurved filiform point 12–13 mm long. Lateral sepals elliptic in outline when flattened; conjoined part shallowly concave, 8–9 mm long, 5–6 mm wide, margins incurved, densely ciliate; free points filamentous, 5–6 mm long, curved forwards strongly, divergent, c. 8 mm apart at the tips. Petals with a well-developed proximal flange that nearly blocks off the base of the galea. Labellum narrow-ovate, 5–5.5 mm long, 2–2.3 mm wide, brown, distal half covered with shorter, appressed trichomes; marginal trichomes 6–8 pairs, 0.3 mm long, white, spreading; basal lobe prominently raised, with 8–10 pairs of white trichomes c. 0.5 mm long.

Photo Lachlan Copeland

Photo Lachlan Copeland

Photo Lachlan Copeland

Flowering: September–November

Distribution and occurrence: Grows among rocks on low hills and on slopes above streams; chiefly from Nyngan to Bourke district.
NSW subdivisions: NWP, NFWP, SFWP
Other Australian states: Qld
Threatened species: NSW BCA: Vulnerable
AVH map***

Text by D. L. Jones
Taxon concept: Flora of NSW 4 (1993)

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.
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