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Pterostylis parviflora R.Br.
Family Orchidaceae
Common name: Tiny Greenhood

Pterostylis parviflora R.Br. APNI*

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

Description: Terrestrial herb; with 1–3 rosettes on a mature plant.

Rosette leaves 3–8, ovate to cordate, 0.7–3 cm long, 4–15 mm wide, margins entire or crenulate; petiolate.

Scape 8–15 cm high, wiry, with 3–6 closely sheathing stem leaves. Flowers 1–5, c. 0.7 cm long, erect, green and white, sometimes brownish in the galea, narrow. Galea erect in the basal half, curved forwards in the distal half. Dorsal sepal acuminate. Lateral sepals tightly embracing the galea; sinus shallowly notched when viewed from the front, stepped when viewed from the side; free points linear-tapered, c. 2 mm long, not exceeding the galea. Petals falcate. Labellum narrow-elliptic, c. 3 mm long, c. 1 mm wide, not visible through the sinus in the set position.

Photo Lachlan Copeland

Photo Lachlan Copeland

Photo W. Cherry

Flowering: February–June.

Distribution and occurrence: Grows in sclerophyll forest and heath, widespread.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS
Other Australian states: Qld Vic. Tas. S.A.
AVH map***

Pterostylis parviflora belongs to a complex of forms characterised by their multiflorous inflorescence, small flowers, and rosettes produced on lateral growths at the base of the scape, which have been placed in the segregate genus Speculantha. Pterostylis parviflora differs from many of the forms within this complex because its galea surface is smooth, it is not ornamented with papillae or other scaberous low projections.

Text by D.L. Jones, updated by Matt A.M. Renner (18 Dec 2019).
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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