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Diuris aurea Sm.
Family Orchidaceae
Diuris aurea Sm. APNI*

Description: Terrestrial herb.

Leaves 1 or 2, linear, 10–20 cm long, 4–6 mm wide, conduplicate.

Raceme 30–60 cm high, 2–5-flowered. Flowers golden yellow to orange with dark markings on the labellum an dorsal sepal, c. 3.5 c. across. Dorsal sepal broad-ovate, 8–15 mm long, 7–14 mm wide, obliquely erect. Lateral sepals linear to oblanceolate or spathulate, 10–25 mm long, 2–5 mm wide, deflexed, usually parallel. Petals obliquely erect, divergent; lamina broad-ovate to broad-obovate, 7–17 mm long, 6–14 mm wide; claw 5–8 mm long, dark-coloured, curved. Labellum 10–16 mm long; lateral lobes elliptic to cuneate, 4–6 mm long, 2–4 mm wide, margins irregularly toothed; midlobe broad-ovate when flattened, 7–13 mm wide, ridged along midline; callus of 2 divergent ridges 6–7 mm long.

Photo J. Plaza

Flowering: August–November

Distribution and occurrence: Grows in moist grass in sclerophyll forest in coastal and near-coastal districts; north of Marulan to the Hunter Valley.
NSW subdivisions: NC, CC, CT, ST, SWS
AVH map***

Hybridzes with D. punctata (producing D.X nebulosa D. L. Jones)

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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