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Diuris semilunulata Messmer
Family Orchidaceae
Diuris semilunulata Messmer APNI*

Description: Terrestrial herb.

Leaves 2, linear, 15–25 cm long, 3–4 mm wide, conduplicate.

Raceme 20–35 cm high, 3–5-flowered. Flowers orange, heavily blotched and suffused with brown and purple. Dorsal sepal ovate, 6–10 mm long, 7–10 mm wide, erect. Lateral sepals linear to oblanceolate, 12–18 mm long, 2–4 mm wide, crossed and recurved beneath the labellum. Petals divergent; lamina ovate to obovate, 5–11 mm long, 4–9 mm wide; claw 5–9 mm long. Labellum 4–8 mm long; lateral lobes narrow- to broad-cuneate, 5–8 mm long, 2–7.5 mm wide, margins crenulate; midlobe cuneate, 5–7 mm wide, ridged along midline; callus of 2 raised ridges 3–6 mm long.

Photo © ANBG

Flowering: October–December

Distribution and occurrence: Grows among grass and shrubs in sclerophyll forest; south from Nerriga ST; ?Vic.
NSW subdivisions: CT, ST
Other Australian states: ?Vic.
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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