Species of orchid
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Pterostylis aneba is a species of orchid endemic to south-eastern Australia. It is a recently described and poorly-known greenhood similar to "Pterostylis alpina" and "P. monticola". It has a rosette of fleshy leaves at the base of the plant and a single green and white flower. It grows in alpine and sub-alpine habitats.
Description.
"Pterostylis aneba" is a terrestrial, perennial, deciduous, herb with an underground tuber and a rosette of three to five egg-shaped leaves surrounding the base of the flowering stem. Each leaf is long and wide. A single green and white flower about long is borne on a spike up to high. The dorsal sepal and petals are fused, forming a hood or "galea" over the column. The dorsal sepal is the same length as the petals and curves forward with a pointed tip. There is a gap between the galea and the lateral sepals. The lateral sepals are erect and have thread-like tips 15–20 mm long and a slightly bulging V-shaped sinus between them. The labellum is long, about wide, green or brown and curved and protrudes above the sinus. Flowering occurs from December to February.
Taxonomy and naming.
"Pterostylis aneba" was first formally described in 2006 by David Jones and the description was published in "Australian Orchid Research" from a specimen collected at Packers Swamp, west of Bemboka.
Distribution and habitat.
This greenhood grows in moist grassy areas in montane forest and near streams in southern New South Wales and north-eastern Victoria.
References.
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