Pterostylis recurva

by Michaela Perryman

Title

Pterostylis recurva

Artist

Michaela Perryman

Medium

Photograph - Photography

Description

Pterostylis recurva commonly known as the jug orchid, recurved shell orchid, antelope orchid or bull orchid is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It is a relatively common orchid which has up to four jug-shaped or funnel-shaped white flowers with green and brown lines and markings. Non-flowering plants have a rosette of leaves on a short stalk.

Pterostylis recurva, is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of between three and seven leaves 7–40 mm (0.3–2 in) long and 5–15 mm (0.2–0.6 in) wide. Flowering plants lack a rosette but have between ten and sixteen stem leaves which are 30–50 mm (1–2 in) long and 10–12 mm (0.4–0.5 in) wide with their bases wrapped around the flowering stem. Up to four white flowers with green and brown lines are borne on the flowering stem which is 150–900 mm (6–40 in) high. The flowers are jug-shaped or funnel-shaped, 30–35 mm (1.2–1.4 in) long and 15–25 mm (0.6–1 in) wide. The dorsal sepal and petals form a hood or "galea" over the column with the dorsal sepal having a narrow tip 4–6 mm (0.2–0.2 in) long. The lateral sepals are joined for about half their length and suddenly taper to narrow tips 23–26 mm (0.91–1.0 in) long which turn sharply downwards. The labellum is reddish, insect-like and held inside the flower except for its tip. Flowering occurs from August to October

Serpentine Forest, Western Australia

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September 25th, 2020

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