Caladenia radialis

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Drooping spider orchid
Caladenia radialis 02.jpg
Caladenia radialis growing near Badgingarra
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Caladenia
Species:C. radialis
Binomial name
Caladenia radialis
Synonyms
  • Calonema radiale (R.S.Rogers D.L.Jones & M.A.Clem.
  • Phlebochilus radialis(R.S.Rogers) Szlach.
  • Calonemorchis radialis(R.S.Rogers) D.L.Jones & M.A.Clem.
  • Jonesiopsis radialis(R.S.Rogers) D.L.Jones & M.A.Clem.

Caladenia radialis, commonly known as the drooping spider orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single erect, hairy leaf and one or two red and cream-coloured flowers. In good seasons it forms clumps of up to ten plants.

Endemism ecological state of being unique to a defined geographic location or habitat

Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution. An alternative term for a species that is endemic is precinctive, which applies to species that are restricted to a defined geographical area.

Western Australia state in Australia

Western Australia is a state occupying the entire western third of Australia. It is bounded by the Indian Ocean to the north and west, and the Southern Ocean to the south, the Northern Territory to the north-east, and South Australia to the south-east. Western Australia is Australia's largest state, with a total land area of 2,529,875 square kilometres, and the second-largest country subdivision in the world, surpassed only by Russia's Sakha Republic. The state has about 2.6 million inhabitants – around 11 percent of the national total – of whom the vast majority live in the south-west corner, 79 per cent of the population living in the Perth area, leaving the remainder of the state sparsely populated.

Contents

Caladenia radialis habit Caladenia radialis 01.jpg
Caladenia radialis habit
Caladenia radialis labellum detail Caladenia radialis 03.jpg
Caladenia radialis labellum detail

Description

Caladenia radialis is a terrestrial, perennial, deciduous, herb with an underground tuber and which often forms clumps of up to ten plants after good rainfall. It has a single erect, hairy leaf, 50–180 mm (2–7 in) long and about 6 mm (0.2 in) wide. One or two red and cream-coloured flowers 40–50 mm (1.6–2.0 in) long and 40–80 mm (2–3 in) wide are borne on a stalk 150–350 mm (6–10 in) tall. The sepals and petals have long, brown, drooping thread-like tips. The dorsal sepal curves forward and is 25–45 mm (1–2 in) long and about 2 mm (0.08 in) wide. The lateral sepals and petals have about the same dimensions as the dorsal sepal although the lateral sepals are slightly wider. The labellum is 12–15 mm (0.5–0.6 in) long, 8–10 mm (0.3–0.4 in) wide and cream-coloured with red lines. The sides of the labellum sometimes have a few short teeth, the tip is curled under and there is a dense band of red or cream-coloured calli along the mid-line. Flowering occurs from August to early October. [2] [3] [4]

Perennial plant Plant that lives for more than two years

A perennial plant or simply perennial is a plant that lives more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth from trees and shrubs, which are also technically perennials.

Deciduous trees or shrubs that lose their leaves seasonally

In the fields of horticulture and botany, the term deciduous (/dɪˈsɪdʒuəs/) means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, after flowering; and to the shedding of ripe fruit.

Herbaceous plant Plant which has no persistent woody stem above ground

Herbaceous plants are plants that have no persistent woody stem above ground. The term is mainly applied to perennials, but in botany it may also refer to annuals or biennials, and include both forbs and graminoids.

Taxonomy and naming

Caladenia radialis was first described in 1927 by Richard Rogers from a specimen collected near Dowerin and the description was published in Transactions and proceedings of the Royal Society of South Australia . [1] [5] The specific epithet (radialis) is derived from the Latin word radius meaning "ray", "rod" or "spoke", [6] referring to the radiating red lines on the labellum. [3]

Richard Sanders Rogers Australian doctor, botanist, orchidologist

Richard Sanders Rogers was a distinguished Australian medical doctor, and world authority on Australasian orchids. He described over 80 Australian orchid species, three from New Zealand and 30 from New Guinea as well as three new genera including one from New Zealand. He was a consulting physician at the Adelaide Hospital and a member of its board. He may have been the first to practise hypnotism during surgery, allowing him to remove a cyst from a woman's breast without anaesthetics "while she was still awake and talking to assistants and witnesses standing nearby."

Dowerin, Western Australia Town in Western Australia

Dowerin is a town and shire 156 kilometres (97 mi) north-east of Perth in the central Wheatbelt region of Western Australia.

The Royal Society of South Australia (RSSA) is a Learned Society whose interest is in Science, particularly, but not only, of South Australia. The major aim of the Society is the promotion and diffusion of scientific knowledge, particularly in relation to Natural Sciences.

Distribution and habitat

The drooping spider orchid is found between the Fitzgerald River National Park and Northampton in the Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest and Mallee biogeographic regions where it grows in a range of habitats including on granite outcrops and near the edges of salt lakes. [2] [3] [4] [7]

Fitzgerald River National Park Protected area in Western Australia

Fitzgerald River National Park is a national park in the Shires of Ravensthorpe and the Jerramungup in Western Australia, 419 kilometres (260 mi) southeast of Perth.

Northampton, Western Australia Town in Western Australia

Northampton is a town 52 kilometres (32 mi) north of Geraldton, in the Mid West region of Western Australia. At the 2011 census, the town had a population of 868. The town contains a National Trust building. The town lies on the North West Coastal Highway. Originally called The Mines, Northampton was gazetted in 1864 and named after the colony's Governor, John Hampton. The town was sited in the Nokanena Brook valley, between the hamlets around the two major copper mines in the area, the Wanerenooka and the Gwalla.

Avon Wheatbelt

The Avon Wheatbelt is an Australian bioregion in Western Australia and part of the larger Southwest Australia savanna ecoregion.

Conservation

Caladenia radialis is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife. [7]

Department of Parks and Wildlife (Western Australia) department of the Government of Western Australia

The Department of Parks and Wildlife (DPaW) was the department of the Government of Western Australia responsible for managing lands described in the Conservation and Land Management Act 1984 and implementing the state's conservation and environment legislation and regulations. The minister responsible for the department was the Minister for the Environment.

Related Research Articles

<i>Caladenia cruscula</i> species of plant

Caladenia cruscula, commonly known as the reclining spider orchid is a species of orchid endemic to a small area in the south-west of Western Australia. It has a single hairy leaf and a single cream-coloured flower with a long red fringe on the sides of its labellum.

Caladenia denticulata subsp. albicans, commonly known as the alabaster spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single erect, hairy leaf and one or two pale creamy-white flowers which have a white labellum with red markings. The only known population occurs in a small area near Arrowsmith.

Caladenia denticulata subsp. rubella, commonly known as the clumped spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single erect, hairy leaf and one or two dull or pinkish red flowers with prominent dull red markings and with a white labellum with red markings.

Caladenia dundasiae, commonly known as the Patricia's spider orchid and Dundas spider orchid is a species of orchid endemic to a small area in the south-west of Western Australia. It is a rare orchid with a single hairy leaf and one or two, usually red flowers with thin, stiffly-held lateral sepals and petals.

Caladenia erythronema, commonly known as the red thread spider orchid, and Nyabing spider orchid is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single hairy leaf and up to three red, yellow or cream-coloured flowers with dangling, thread-like sepals and petals and a small labellum.

<i>Caladenia excelsa</i> species of plant

Caladenia excelsa, commonly known as the giant spider orchid, is a species of orchid endemic to a small area in the south-west of Western Australia. It is a rare species with a single, hairy leaf and up to three cream-coloured to greenish-cream flowers with long, drooping sepals and petals. It is one of the tallest spider orchids in Western Australia and, with Caladenia splendens, has the largest flowers of any Western Australian orchid.

Caladenia exilis subsp. exilis, commonly known as the salt lake spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It is a relatively common spider orchid with a single erect, hairy leaf and up to three white to greenish-cream flowers with a small white, red-striped labellum.

Caladenia exilis subsp. vanleeuwenii, commonly known as the Moora spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It is a relatively rare spider orchid with a single erect, hairy leaf and up to three variably-coloured flowers with a small white, red-striped labellum. It differes from subspecies exilis in having variably coloured flowers, different growth habit, earlier flowering and different habitat.

<i>Caladenia horistes</i> species of plant

Caladenia horistes, commonly known as the cream spider orchid is a species of orchid endemic to the south-west of Western Australia. It has a single, hairy leaf and one or two, creamy-yellow flowers which have a red-striped labellum and long, dark, thread-like tips on the sepals and petals.

Caladenia luteola, commonly known as the lemon spider orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single, hairy leaf and up to three lemon-yellow flowers with red stripes on the labellum. It is only known from two small populations near Woodanilling.

Caladenia melanema, commonly known as the ballerina orchid, is a species of orchid endemic to the south-west of Western Australia. It is a rare orchid with a single erect, hairy leaf and one or two cream-coloured to pale yellow flowers with red markings and black tips on the sepals and petals.

Caladenia meridionalis, commonly known as the south coast spider orchid, is a species of orchid endemic to the south-west of Western Australia. It is an early-flowering orchid with a single erect, hairy leaf and one or two white flowers with long, drooping lateral sepals and petals.

<i>Caladenia multiclavia</i> species of plant

Caladenia multiclavia, commonly known as the lazy spider orchid is a species of orchid, endemic to the south-west of Western Australia. It has a single, hairy leaf and one or two greenish-yellow, red and cream-coloured flowers resembling a reclining spider. Although it usually only has a single flower, it often grows in clumps of up to six plants.

Caladenia pendens subsp. pendens, commonly known as the pendant spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single hairy leaf and up to three relatively large, creamy-white flowers with long drooping petals and sepals and sometimes has a sickly-sweet scent.

<i>Caladenia pendens</i> subsp. <i>talbotii</i> subspecies of plant

Caladenia pendens subsp. talbotii, commonly known as Talbot's spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single hairy leaf and one or two white, red and yellow flowers with long drooping petals and sepals and sometimes has a citrus-like scent.

Caladenia perangusta, commonly known as the Boyup Brook spider orchid, is a species of orchid endemic to the south-west of Western Australia. It is a rare spider orchid with a single hairy leaf and one or two cream-yellow or red flowers with narrow, drooping sepals and petals.

Caladenia pholcoidea subsp. pholcoidea, commonly known as the Albany spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single hairy leaf and up to four pale yellow flowers with long drooping petals and lateral sepals.

<i>Caladenia polychroma</i> species of plant

Caladenia polychroma, commonly known as the Joseph's spider orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single erect, hairy leaf and one or two relatively large and colourful but smelly flowers.

Caladenia petrensis, commonly known as the rock spider orchid is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia. It has a single erect, hairy leaf and up to three pale yellow flowers with drooping lateral sepals and petals.

Caladenia xantha, commonly known as the primrose spider orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single erect, hairy leaf and up to three yellow flowers with a cream-coloured, brown-striped labellum.

References

  1. 1 2 "Caladenia radialis". APNI. Retrieved 8 March 2017.
  2. 1 2 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 112. ISBN   1877069124.
  3. 1 2 3 Brown, Andrew; Dundas, Pat; Dixon, Kingsley; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 161. ISBN   9780980296457.
  4. 1 2 Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 78. ISBN   9780646562322.
  5. ↑ Rogers, Richard Sanders (1927). "Contributions to the Orchidology of Australia". Transactions and proceedings of the Royal Society of South Australia. 51: 296. Retrieved 8 March 2017.
  6. ↑ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 664.
  7. 1 2 "Caladenia radialis". FloraBase . Western Australian Government Department of Parks and Wildlife.
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