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Diuris flavescens D.L.Jones
Family Orchidaceae
Diuris flavescens D.L.Jones APNI*

Description: Terrestrial herb.

Leaves 2, linear, 8–17 cm long, 3–4 mm wide, conduplicate.

Raceme 10–20 cm high, 1–5-flowered. Flowers pale yellow with dark brown markings on the dorsal sepal and labellum, c. 1.2 c. across. Dorsal sepal linear to ovate, 6–9 mm long, 4–5 mm wide, obliquely erect. Lateral sepals linear to oblanceolate, 12–18 mm long, 1.2–1.8 mm wide, deflexed, parallel or crossed. Petals obliquely erect, widely divergent, slightly recurved; lamina elliptic to nearly circular, 6–9 mm long, 4–5 mm wide; claw 4–6 mm long. Labellum 6–8 mm long; lateral lobes linear to ± ovate, obtuse, often irregular, 2–3 mm long, 0.8–1.2 mm wide; midlobe ovate when flattened, 4.5–6.5 mm wide, ridged along midline; callus of 2 divergent, incurved ridges c. 5 mm long.


Illustration
C. Wardrop

Fruit
Photo A.E. Orme

Flowering: September–October

Distribution and occurrence: Grows in moist grassland in tall sclerophyll forest; rare, near Wingham.
NSW subdivisions: NC

Threatened species: NSW TSCA: Critically Endangered ROTAP: 2K
AVH map***

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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