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Pterostylis subtilis D.L.Jones
Family Orchidaceae
Pterostylis subtilis D.L.Jones APNI*

Description: Terrestrial herb.

Leaves 5 or 6, either in a loose rosette or scattered up the scape, sessile; lamina broadly elliptic, 30–50 mm long by 15–25 mm wide, dark green, coriaceous, smooth.

Scape 12–25 cm tall, 2.5–3.0 mm thick, scabrous, 1-flowered. Flower erect, 35–45 mm long by 15–20 mm wide, dark green and white. Galea apex horizontal to obliquely erect. Dorsal sepal 43–47 mm long by 23–26 mm wide, slightly longer than the petals, acute. Lateral sepals with a narrow lateral gap; synsepalum 40–45 mm long by 12–20 mm wide, curved when viewed from the side; sinus narrowly and deeply notched; free points 15–20 mm long, erect, narrowly tapered. Petals oblong-obovate, nearly straight, 38–42 mm long by 8–9 mm wide, acute. Labellum protruding when set; lamina oblong, tapered, 16–20 mm long by 3.0–3.5 mm wide, brown, curved, apex obtuse; basal appendage recurved, 4–5 mm long, penicillate.


Flowering: December–January.

Distribution and occurrence: Endemic to Barrington Tops.

Pterostylis subtilis grows on sheltered slopes and flats in grassy areas of montane and subalpine woodland, often near streams and the margins of swamps, between 900–1200 m elevation.
NSW subdivisions: NT
AVH map***

Text by Matt A.M. Renner (16 Dec 2019) based on Jones (2006)
Taxon concept: Jones DL (2006) Miscellaneous new species of Australian Orchidaceae. Australian Orchid Research 5: 45–111.

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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