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Common name: Common Onion Orchid
Microtis unifolia (G.Forst.) Rchb.f. APNI*
Synonyms: Microtis porrifolia (Sw.) R.Br. ex Spreng. APNI*
Microtis aemula Schltdl. APNI*
Description: Slender to robust terrestrial herb, usually 20–60 cm high.
Leaf 8–60 cm long.
Inflorescence to 60 cm high, 6–100-flowered; pedicels 1–1.5 mm long; bract lanceolate to ± ovate, 2–4 mm long, 1–1.5 mm wide. Flowers often lightly scented, green or yellow-green, ± erect. Dorsal sepal ovate to circular, 2–4 mm long, 1–2 mm wide, markedly concave below, apex broad and obtuse to acute, often apiculate. Lateral sepals linear to oblong to lanceolate or ovate, recurved or rolled, 1.5–2.5 mm long by 0.8–1.2 mm wide. Petals ± falcate to lanceolate or ovate, 1.4–1.8 long, 0.4–0.8 mm wide. Labellum oblong, 1.2–2.5 mm long, 0.4–2 mm wide, basal calli saddle-shaped, rounded or square, smooth; margins undulate, crenulate to rugulose. Column erect or decurved, with ovate lateral appendages.
Distribution and occurrence: Grows in wide variety of habitats from coastal swamps to rock outcrops in semi-arid areas; west to Deniliquin district.
NSW subdivisions: NC, CC, SC, NT, CT, ST, NWS, CWS, SWS, NWP, SWP, LHI
Other Australian states: Qld Vic. Tas. W.A. S.A.
Text by R. R. Rowe
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.