Pterostylis anaclasta

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Pterostylis anaclasta
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Cranichideae
Genus: Pterostylis
Species:
P. anaclasta
Binomial name
Pterostylis anaclasta
Synonyms [2]

Oligochaetochilus anaclastus D.L.Jones

Pterostylis anaclasta is a species of flowering plant in the orchid family Orchidaceae and is endemic to a restricted part of Queensland. It has a rosette of about 6 sessile leaves and about 4 transparent white flowers with bright reddish lines and markings, a reddish brown labellum with white hairs, and lateral sepals strongly turned backwards.

Contents

Description

Pterostylis anaclasta is a terrestrial, perennial, deciduous, herb with an underground tuber. It has a rosette of between about 6, sessile oblong to elliptic leaves at the base of the flowering spike, each leaf 10–15 mm (0.39–0.59 in) long and 5–15 mm (0.20–0.59 in) wide. About 4 transparent white flowers with bright reddish lines and markings are more on a flowering spike about 140 mm (5.5 in) high, each flower on a thin pedicel 3–8 mm (0.12–0.31 in) long. The dorsal sepal and petals form a hood or "galea" over the column with the dorsal sepal. The dorsal sepal is about 20 mm (0.79 in) long, including a thread-like tip about 7 mm (0.28 in) long. The lateral sepals turn downwards and strongly backwards about 8 mm (0.31 in) long and 11 mm (0.43 in) wide with thread-like tips about 12 mm (0.47 in) long. The petals are egg-shaped, about 15 mm (0.59 in) long and 5 mm (0.20 in) wide. The labellum is reddish-brown, insect-like, about 6.5 mm (0.26 in) long, 3.8 mm (0.15 in) wide and has white bristles around its edges. Flowering has been observed in September. [3]

Taxonomy

This orchid was first formally described in 2010 by David Jones who gave it the name Oligochaetochilus anaclastus in the journal The Orchadian from plants grown at the Australian National Botanic Gardens from a cutting collected near Eungella Dam. [4] In the same year, Jasmine Janes and Marco Duretto changed the name to Pterostylis anaclasta in Australian Systematic Botany . [5] The specific epithet (anaclastus) means bent backwards, referring to the lateral sepals. [3]

Distribution and habitat

Pterostylis anaclasta is only known from the type location near Eungella Dam where it grows on rocky outcrops in open forest. [3]

Related Research Articles

<i>Pterostylis stenochila</i> Species of orchid

Pterostylis stenochila, commonly known as the narrow-lip leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to Tasmania. Flowering plants have up to seven shiny, transparent green flowers with darker green stripes. The flowers have an insect-like labellum which is green with an emerald green stripe along its centre. Non-flowering plants have a rosette of leaves on a stalk, but flowering plants lack the rosette, instead having five or six stem leaves.

<i>Pterostylis crassicaulis</i> Species of orchid

Pterostylis crassicaulis, commonly known as the alpine swan greenhood, is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. It has a rosette of leaves and up to 18 bluish-green and white flowers with dark green stripes. The flowers have a labellum with a dark green, beak-like appendage. It is similar to P. cycnocephala but is more robust and grows at higher altitudes.

<i>Pterostylis rubescens</i> Species of orchid

Pterostylis rubescens, commonly known as the blushing tiny greenhood, is a species of orchid endemic to south-eastern Australia. As with similar orchids, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves but the flowering plants lack a rosette at the base and have up to eighteen tiny green, white and brownish flowers.

Pterostylis anatona, commonly known as the Eungella greenhood, is a species of orchid endemic to Queensland. It has a rosette of wrinkled leaves at the base of the plant and a single light green and white flower, reddish towards its tip. It grows in higher areas between Eungella and the Blackdown Tableland National Park.

Pterostylis aquilonia, commonly known as the northern cobra greenhood, is a species of orchid endemic to Queensland. As with similar orchids, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves, but the flowering plants lack a rosette and have a single flower with leaves on the flowering spike. This greenhood has a relatively large green, white and reddish-brown self-pollinating flower.

Pterostylis arenicola, commonly known as the sandhill rustyhood is a plant in the orchid family Orchidaceae and is endemic to South Australia. It has a rosette of leaves near its base and up to ten reddish-brown and white flowers with a dark brown, insect-like labellum. Its distribution is now restricted to areas around Lake Alexandrina.

Pterostylis clivicola is a plant in the orchid family Orchidaceae and is endemic to a small area near the border between New South Wales and Victoria. It has a rosette of leaves and up to fourteen green flowers which have a labellum with a dark green, beak-like appendage.

Pterostylis frenchii, commonly known as the tuart rufous greenhood, or tuart rustyhood is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a relatively large rosette of leaves. Flowering plants also have up to twelve white and green or white and brown flowers which lean forward and have a small, fleshy, insect-like labellum.

Pterostylis ferruginea, commonly known as the Bangham rustyhood, is a plant in the orchid family Orchidaceae and is endemic to the border area between South Australia and Victoria. It has a rosette of leaves and when flowering, up to ten upright, dark green and translucent white flowers which have an insect-like labellum.

Pterostylis lepida, commonly known as the Halbury greenhood is a plant in the orchid family Orchidaceae and is endemic to South Australia. Both flowering and non-flowering plants have a rosette of leaves. Flowering plants have up to ten green flowers with brown and translucent striations and a small, insect-like labellum. It is only known from two small populations.

<i>Pterostylis lineata</i> Species of orchid

Pterostylis lineata, commonly known as the Blue Mountains leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to New South Wales. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves on a short stalk but the flowering plants lack a rosette and have up to seven dark green flowers with translucent "windows" on a flowering stem with stem leaves. The labellum is light brown with a black strip along its mid-line.

Pterostylis macrosceles, commonly known as the slender rufous greenhood is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a relatively large rosette of leaves. Flowering plants also have between four and eight white flowers with green brown lines and small, insect-like labellum. It is distinguished from other Western Australian greenhoods by the unusually long thread-like tips on its sepals.

<i>Pterostylis mirabilis</i> Species of orchid

Pterostylis mirabilis, commonly known as the nodding rufous-hood, is a plant in the orchid family Orchidaceae and is endemic to South Australia. It has a rosette of leaves at its base and up to ten greenish-white flowers with a narrow hood, down-turned lateral sepals and a thin-textured, insect-like labellum.

<i>Pterostylis praetermissa</i> Species of orchid

Pterostylis praetermissa, commonly known as the Mount Kaputar rustyhood is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It has a rosette of leaves and up to nine relatively small greenish and reddish-brown flowers with transparent "windows" and a reddish-brown, insect-like labellum.

Pterostylis procera, commonly known as the short-lipped greenhood, is a species of orchid endemic to Queensland. It has a rosette of leaves and when flowering a single translucent white flower with green and reddish markings and a labellum which does not protrude through the lateral sepals.

Pterostylis psammophila, commonly known as the two-bristle greenhood, is a plant in the orchid family Orchidaceae and is endemic to South Australia. Both flowering and non-flowering plants have a rosette of leaves and flowering plants have translucent green and white flowers with an insect-like labellum, but the flowers are only open for a few days.

Pterostylis saxicola, commonly known as the Sydney plains rustyhood, or Sydney plains greenhood, is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It has a rosette of leaves at its base and up to ten reddish-brown flowers with translucent "windows", relatively wide lateral sepals with short-pointed tips and a dark brown, fleshy, insect-like labellum.

Pterostylis stricta, commonly known as the northern greenhood, is a species of orchid endemic to Queensland. It has a rosette of leaves and when flowering a single translucent white flower with green lines, a reddish-brown tip and a curved, protruding labellum.

Pterostylis orbiculata, commonly known as the coastal banded greenhood, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. The plants either have a rosette of leaves in the years when not flowering or stem leaves on a flowering spike. When flowering, it has up to twenty flowers that are reddish brown, greenish brown or green with a reddish or brownish labellum with short stiff hairs.

Pterostylis atrosanguinea, commonly known as the crowded banded greenhood, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. The plants either have a rosette of leaves in the years when not flowering or stem leaves on a flowering spike. When flowering, it has up to twenty flowers that are dark reddish to blackish brown with translucent white areas. The labellum is dark reddish black and covered with short, stiff hairs.

References

  1. "Pterostylis anaclasta". Plants of the World Online. Retrieved 26 March 2023.
  2. "Pterostylis anaclasta". Plants of the World Online. Retrieved 26 March 2023.
  3. 1 2 3 Jones, David L. (2010). "Four new species of Oligochaetochilus (Orchidaceae) from tropical Queensland". The Orchadian. 16 (7): 302–303, 308. Retrieved 26 March 2023.
  4. "Oligochaetochilus anaclastus". APNI. Retrieved 13 June 2017.
  5. "Pterostylis anaclastus". APNI. Retrieved 13 June 2017.