Pterostylis alpina R.S.Rogers APNI*
Description: Terrestrial herb.
Rosette leaves 3–5, scattered on the basal part of the stem, ovate to elliptic or obovate, 2–6 cm long, 10–15 mm wide, margins entire; sessile.
Scape to 30 cm high; stem scabrous. Flower c. 3 cm long, erect, dark green and white. Apex of galea flat or slightly decurved. Dorsal sepal acute to subacute. Lateral sepals loosely embracing the galea leaving a lateral gap; sinus broadly notched when viewed from the front, protruding prominently in an abrupt curve when viewed from the side; free points linear-tapered, c. 20 mm long, reflexed behind the galea. Petals broad, subacute. Labellum narrow-ovate to lanceolate, 13–18 mm long, c. 3 mm wide, brown, curved forwards above the middle, subacute, distal third protruding from the sinus in the set position.
Distribution and occurrence: Grows on moist slopes and near streams in high rainfall forest; apparently restricted to the Batlow region in N.S.W.
NSW subdivisions: ST
Other Australian states: Vic. ?Tas.
Threatened species: NSW BCA: Vulnerable
Text by D. L. Jones
Taxon concept: Flora of NSW 4 (1993)
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