Pterostylis loganii, commonly known as the Logan's leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to a small area near the border between New South Wales and Victoria. Flowering plants have up to five pale green flowers with darker green stripes and brownish tips. The flowers have a brown labellum with a blackish stripe and a blackish mound near its base. Non-flowering plants have a rosette of leaves on a short, thin stalk but flowering plants lack the rosette, instead having five to seven stem leaves.
Pterostylis littoralis, is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of between three and five egg-shaped leaves which are NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide and on a thin stalk. Flowering plants have up to nine pale green flowers with darker green stripes on a flowering spike NaNsigfig=1NaNsigfig=1 high. The flowers are NaNsigfig=1NaNsigfig=1 long and the flowering stem has between five and seven linear to lance-shaped stem leaves which are NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide. The dorsal sepal and petals are fused, forming a hood or "galea" over the column with the dorsal sepal having a short point on its brownish tip. The lateral sepals turn downwards and are NaNsigfig=1NaNsigfig=1 long, NaNsigfig=1NaNsigfig=1 wide, joined for part of their length and have narrow brownish tips NaNsigfig=2NaNsigfig=2 long. The labellum is NaNsigfig=2NaNsigfig=2 long, about 2sigfig=1NaNsigfig=1 wide and pale green with a dark brown line along its centre and a dark brown mound near its base. Flowering occurs from August to October.[1] [2]
This leafy greenhood was first formally described in 2006 by David Jones who gave it the name Bunochilus loganii and published the description in Australian Orchid Research from a specimen collected near Carabost.[3] In 2008 Gary Backhouse changed the name to Pterostylis loganii.[4] The specific epithet (loganii) honours Alan Edward Logan, a farmer and naturalist who discovered the species and collected the type specimen.
Pterostylis loganii grows in forest with grasses and shrubs in the far north-east of Victoria and the southern tablelands and slopes of New South Wales.[5]