Angus onion orchid (Microtis angusii)
Description
Microtis angusii, commonly known as the Mona Vale onion orchid, and Angus's onion orchid is a species of orchid endemic to New South Wales. It has a single hollow, onion-like leaf and up to sixty small, crowded green flowers. It is only known from a single population near Ingleside where it grows in soil that may have been imported from elsewhere. Microtis angusii is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, smooth, tubular leaf 400–1,400 mm (20–60 in) long and 5–8 mm (0.2–0.3 in) wide. Between twenty and sixty green flowers are arranged along a flowering stem 250–600 mm (10–20 in) tall. The flowers are 2.5–3 mm (0.098–0.12 in) long and 2–2.5 mm (0.08–0.1 in) wide. The dorsal sepal is 2–2.5 mm (0.08–0.1 in) long, about 2 mm (0.08 in) wide and the lateral sepals are a similar length but narrower with their tips rolled under. The petals are about 1 mm (0.04 in) long and wide and are held under the dorsal sepal. The labellum is 1.5–2 mm (0.06–0.08 in) long, about 1 mm (0.04 in) wide with a lumpy edge and a shallow notch on the tip. Flowering occurs from May to October.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Liliopsida
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Order: Asparagales
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Family: Orchidaceae
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Genus: Microtis
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