Common name: Large Striped Greenhood
Pterostylis robusta R.S.Rogers APNI*
Synonyms: Diplodium robustum (R.S.Rogers) D.L.Jones & M.A.Clem. APNI*
Pterostylis scabra var. robusta (R.S.Rogers) A.S.George APNI*
Description: Terrestrial herb.
Rosette leaves 4–10, ovate, 1–2.5 cm long, 10–16 mm wide, margins finely toothed; petiolate.
Scape to 15 cm high, with 3–7 spreading stem leaves. Flower 3–3.5 cm long, erect, green and white with red-brown to brown suffusions and stripes. Dorsal sepal with a filiform point 3–6 mm long. Petal margins not flared. Lateral sepals tightly embracing the galea; sinus flat with a shallow central notch, protruding in a shallow curve when viewed from the side; free points to 25 mm long, filiform, erect, often curved forwards at the apex. Labellum oblong-lanceolate, suddenly tapered in the distal third, 13–15 mm long, c. 3.5 mm wide, the tip just visible from the sinus in the set position.
Distribution and occurrence: Grows on ridges and sheltered slopes in sclerophyll forest; rare, south from Wagga district.
NSW subdivisions: CWS, SWS, SWP
Other Australian states: Vic. S.A.
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
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