Pterostylis lortensis

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Lort River snail orchid
Pterostylis lortensis.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Cranichideae
Genus: Pterostylis
Species:
P. lortensis
Binomial name
Pterostylis lortensis
Synonyms [1]

Diplodium lortensis(D.L.Jones & C.J.French) D.L.Jones & M.A.Clem.

Contents

Pterostylis lortensis, commonly known as the Lort River snail orchid, is a species of orchid endemic to the south-west of Western Australia. Non-flowering plants have a rosette of leaves flat on the ground but flowering plants usually lack a rosette and have a flowering stem with leaves and a single pale green and white flower with narrow, club-like lateral sepals.

Description

Pterostylis lortensis is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of leaves 20–30 mm (0.8–1 in) in diameter. Flowering plants lack a rosette but have a single pale green and white flower 11–13 mm (0.4–0.5 in) long and 3–6 mm (0.1–0.2 in) wide on a flowering stem 40–140 mm (2–6 in) high. There are between three and five leaves 10–25 mm (0.4–1 in) long and 5–14 mm (0.2–0.6 in) wide on the flowering stem. The dorsal sepal and petals are fused, forming a hood or "galea" over the column, the dorsal sepal with a blunt tip. The lateral sepals are held close to the galea, almost close off the front of the flower and have erect, tips 7–9 mm (0.3–0.4 in) long which have slightly-thickened, club-like tips. The labellum is relatively small but is not visible from outside the flower. Flowering occurs from August to September. [2]

Taxonomy and naming

Pterostylis lortensis was first formally described in 2014 by David Jones and Christopher French from a specimen collected near the Lort River and the description was published in Australian Orchid Review. The species had previously been known as Pterostylis sp. 'south coast clubbed sepals'. [3] The specific epithet (lortensis) refers to the Lort River where the type specimen was collected. [3]

Distribution and habitat

The Lort River snail orchid usually grows in winter-wet places, often amongst sedges. It occurs between Boxwood Hill and Israelite Bay in the Esperance Plains biogeographic region. [2] [4]

Conservation

Pterostylis lortensis is listed as "not threatened" by the Government of Western Australia Department of Parks and Wildlife. [4]

Related Research Articles

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Pterostylis atrans, commonly known as the dark-tip greenhood or blunt-tongue greenhood, is a species of orchid endemic to south-eastern Australia. As with similar greenhoods, plants in flower differ from those that are not flowering. The non-flowering plants have a rosette of leaves flat on the ground, but the plants in flower have a single flower with leaves on the flowering stem. In this species, the flower is green and reddish brown with a protruding sinus and small club-like tips on the ends of the lateral sepals.

Pterostylis littoralis, commonly known as the coastal leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to South Australia. Flowering plants have up to five pale green flowers with darker green stripes and brownish tips. The flowers have a narrow, pale green labellum. Non-flowering plants have a rosette of leaves on a short, thin stalk but flowering plants lack the rosette, instead having four or five stem leaves.

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 macrocalymma, commonly known as the large-hooded rufous greenhood or Murchison 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 ten or more white flowers with bold green or pale brown lines and a broad spoon-shaped, insect-like labellum.

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

Pterostylis microphylla, commonly known as the small rosette snail orchid, is a species of orchid endemic to the south-west of Western Australia. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves flat on the ground but the flowering plants have a single flower with leaves on the flowering spike. In this species, the flower is white and green with narrow, erect lateral sepals and a small labellum.

Pterostylis paludosa, commonly known as swamp greenhood, is a species of greenhood orchid endemic to New Zealand. As with similar orchids, plants in flower differ from those that are not. Those not in flower have a rosette of leaves on a short stalk but plants in flower lack a rosette and have a single flower with leaves on the flowering spike. This greenhood has a translucent white flower with pale to yellowish-green stripes.

Pterostylis parva, commonly known as the fawn snail orchid, is a species of orchid endemic to the south-west of Western Australia. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a small rosette of leaves flat on the ground but the flowering plants have a single flower with leaves on the flowering spike. In this species, the flower is small, fawn, green and white and is similar to P. timothyi but smaller in stature.

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

Pterostylis perculta, commonly known as ruddy hood 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 and flowering plants have up to five reddish-brown and white flowers with relatively short tips on the sepals.

Pterostylis platypetala, commonly known as the broad-petalled snail orchid, is a species of orchid endemic to the south-west of Western Australia. It has a rosette of leaves and when flowering, a single green and white flower with relatively wide petals. In ideal conditions it can form colonies of hundreds of plants and often grows under melaleucas on the edge of winter-wet areas.

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

Pterostylis scitula, commonly known as the elegant snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a small rosette of leaves flat on the ground. Flowering plants have a single, small green and white flower with leaves on the flowering stem.

Pterostylis scoliosa, commonly known as the small kinked greenhood, is a species of orchid endemic to Queensland. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves flat on the ground but the flowering plants have a single flower with leaves on the flowering stem. This greenhood has a white, pale green and pale brown flower with a kinked or curved labellum protruding above the sinus between the lateral sepals.

Pterostylis spathulata, commonly known as the spoon-lipped rufous greenhood or Moora 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 ten or more white and green or brown flowers with fine, upturned tips on the lateral sepals and a spoon-shaped, insect-like labellum.

Pterostylis brevichila, commonly known as the dwarf shell orchid, is a species of orchid endemic to the south-west of Western Australia. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves flat on the ground but the flowering plants have a single flower with leaves on the flowering spike. In this species, the flower is small and white with brown stripes and is similar to P. aspera but smaller in stature.

Pterostylis brunneola, commonly known as the giant snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a large rosette of leaves flat on the ground and flowering plants have a single distinctive white flower with pale fawn stripes and have leaves on the flowering spike. This species often forms large colonies, sometimes with Caladenia species.

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

Pterostylis echinulata, commonly known as the hairy-leafed snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a compact rosette of leaves flat on the ground and flowering plants have a single pale yellowish-green flower.

Pterostylis erubescens, commonly known as the red sepaled snail orchid, is a species of orchid endemic to the south-west of Western Australia. Non-flowering plants have a rosette of leaves flat on the ground but flowering plants lack a rosette and have a single large green flower which turns reddish-brown as it ages, and has leaves on the flowering spike.

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

Pterostylis glebosa, commonly known as the clubbed snail orchid, is a species of orchid endemic to the south-west of Western Australia. Non-flowering plants have a rosette of leaves flat on the ground but flowering plants usually lack a rosette and have a single green and white flower with club-like lateral sepals. It sometimes forms colonies of thousands of plants.

Pterostylis jacksonii, commonly known as the southwest granite snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants have a rosette of leaves flat on the ground and flowering plants have a single green and white flower. It is only known from between Walpole and Albany.

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

Pterostylis karri, commonly known as the karri snail orchid, is a species of orchid endemic to the south-west of Western Australia. Both flowering and non-flowering plants usually have a small rosette of leaves and flowering plants have a single green and white flower with unusually long, erect lateral sepals. Like some similar greenhoods, it often forms dense colonies.

Pterostylis microglossa, commonly known as the Kalbarri shell orchid, is a species of orchid endemic to the south-west of Western Australia. Non-flowering plants have a rosette of leaves flat on the ground but flowering plants lack a rosette and have a flowering stem with leaves and a single green, white and brownish-red flower.

References

  1. 1 2 "Pterostylis lortensis". Australian Plant Census. Retrieved 25 October 2024.
  2. 1 2 Brown, Andrew; Dixon, Kingsley; French, Christopher; Brockman, Garry (2013). Field guide to the orchids of Western Australia : the definitive guide to the native orchids of Western Australia. Simon Nevill Publications. p. 368. ISBN   9780980348149.
  3. 1 2 "Pterostylis lortensis". APNI. Retrieved 28 July 2017.
  4. 1 2 "Pterostylis lortensis". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.