Microtis R.Br.
Flowers resupinate. Dorsal sepal hooded Microtis
Upper surface of the labellum with 2 callosities at the base and 1 at the apex
Petals erect held within the dorsal sepal. Labellum less than half as long as ovary. Flowers crowded, green.
Calli at the base of the labellum not united. Petals 2 mm long. Labellum 1–3 mm long, emarginate. Lateral sepals reflexed or rolled. Ovary Plant 15–60 cm high. Widespread. Chiefly in grassland. Fl. Sept.–Nov. Common Onion Orchid Microtis unifolia
Calli at the base of labellum united. Petals less than 2 mm long. Labellum 1.6–1.8 mm long, emarginate, papillose on margin. Plant to 60 cm high. Known only from Mona Vale. Shale. Woodland. Endangered. Fl. May–Oct. Microtis angusii