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Pterostylis obtusa R.Br.
Family Orchidaceae
Common name: Blunt-tongue Greenhood

Pterostylis obtusa R.Br. APNI*

Synonyms: Diplodium obtusum (R.Br.) D.L.Jones & M.A.Clem. APNI*

Description: Terrestrial herb.

Rosette leaves 3–6, oblong to ovate, 1.5–2.5 cm long, 10–15 mm wide, margins crisped; petiolate.

Scape to 25 cm high, with 3–5 stem leaves. Flower 2.5–2.8 cm long, dark green and white, shiny. Galea curved forwards in the distal half. Dorsal sepal with a filiform point to 4 mm long. Petal margins flared. Lateral sepals tightly embracing the galea; sinus raised at the middle, protruding prominently like a platform when viewed from the side; free points c. 20 mm long, filiform, erect. Labellum oblong, obtuse, 9–11 mm long, c. 3 mm wide green with a dark brown apex, the tip just protruding from the sinus in the set position.


Flowering: February–June.

Distribution and occurrence: Grows among grass on moist slopes on ridges in the ranges and tablelands.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, LHI
Other Australian states: Qld Vic. Tas.
AVH map***

Small-flowered variants from northern N.S.W. are under study.Hybridizes with P. ophioglossa (producing P. X furcillata Rupp) and P. concinna.

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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