Species of plant
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Pterostylis brevisepala, commonly known as short-eared snail orchid, is a species of orchid endemic to the south-west of Western Australia. It has a loose rosette of leaves at the base of the plant, and a single green and white flower.
Description.
"Pterostylis brevisepala" is a terrestrial, perennial, herb that typically grows to a height of tall and has a rosette of dull green, egg-shaped to elliptical leaves long and wide on a petiole long. There are 3 to 6 egg-shaped leaves on the stem, long wide. Usually only a single green and white flower long and wide is borne on the flowering stem. The dorsal sepal and petals are fused, forming a hood or "galea" over the column and the dorsal sepal has a short point. The dorsal sepal is long, the lateral sepals tightly embrace the galea and are long. The petals are long and wide and strongly curved. The labellum is oblong to elliptical, about long and wide. Flowering occurs from August to early October.
Taxonomy and naming.
This greenhood was first formally described in 2019 by David Jones and Christopher French who gave it the name "Diplodium brevisepalum" from a specimen collected by French in 2004. In 2018, Jones and French transferred the species to "Pterostylis" as "P. brevisepala". The specific epithet ("brevisepala") means "short sepals".
Distribution and habitat.
Short-eared snail orchid grows in sand in woodland and on the edges of swamps in near-coastal areas between Perth and Lancelin.
Conservation.
"Pterostylis brevisepala" is listed as "not threatened" in Western Australia by the Government of Western Australia Department of Parks and Wildlife.
References.
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