Caladenia robinsonii

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Frankston spider orchid
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Caladenia
Species:C. robinsonii
Binomial name
Caladenia robinsonii
Synonyms [1]

Arachnorchis robinsonii(G.W.Carr) D.L.Jones & M.A.Clem.

Contents

Caladenia robinsonii, commonly known as the Frankston spider orchid is a plant in the orchid family Orchidaceae and is endemic to Victoria. It is a ground orchid with a single hairy leaf and one or two red and creamy-yellow flowers with dark red glandular tips on the sepals. In 2010 only about forty specimens of this plant, growing in a single population were known.

Orchidaceae family of plants

The Orchidaceae are a diverse and widespread family of flowering plants, with blooms that are often colourful and fragrant, commonly known as the orchid family.

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.

Victoria (Australia) State in Australia

Victoria is a state in south-eastern Australia. Victoria is Australia's smallest mainland state and its second-most populous state overall, thus making it the most densely populated state overall. Most of its population lives concentrated in the area surrounding Port Phillip Bay, which includes the metropolitan area of its state capital and largest city, Melbourne, Australia's second-largest city. Victoria is bordered by Bass Strait and Tasmania to the south, New South Wales to the north, the Tasman Sea to the east, and South Australia to the west.

Description

Caladenia robinsonii is a terrestrial, perennial, deciduous, herb with an underground tuber. A shoot arises from the tuber each year in the early autumn producing a single hairy leaf in May. The leaf is 80–100 mm (3–4 in) long and 8–10 mm (0.3–0.4 in) wide. In September or October, one or two red and creamy-yellow flowers 30–40 mm (1–2 in) across are produced on a hairy stem 200–300 mm (8–10 in) high. The sepals, but not the petals, have thick, red glandular tips 5–10 mm (0.2–0.4 in) long. The dorsal sepal is erect near its base then gently curves forward and is 25–35 mm (0.98–1.4 in) long and 3–4 mm (0.1–0.2 in) wide. The lateral sepals are a similar size to the dorsal sepal but spread widely. The petals are 20–30 mm (0.8–1 in) long, about 3 mm (0.1 in) wide and arranged like the lateral sepals. The labellum is 12–14 mm (0.5–0.6 in) long and 7–11 mm (0.3–0.4 in) wide, and creamy yellow with a dark red tip. The sides of the labellum have many short red teeth and the tip of the labellum curves downwards. There are four or six rows of crowded, shiny red calli along the labellum mid-line. Flowering occurs in September and October. [2] [3] [4] [5]

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

Caladenia robinsonii was first formally described in 1991 by Geoffrey Carr from material collected in Frankston North and the description was published in Indigenous Flora and Fauna Association Miscellaneous Paper. [1]

Frankston, Victoria Suburb of Melbourne, Victoria, Australia

Frankston is an outer-suburb of Melbourne in Victoria, Australia, in the local government area of the City of Frankston. It is located 55 km south-east of the Melbourne city centre, north of the Mornington Peninsula. Due to its geographic location, it is often referred to as "the gateway to the Mornington Peninsula".

Distribution and habitat

The Frankston spider orchid occurs in heathy coast manna gum woodland, on the Mornington Peninsula. [5] [2]

<i>Eucalyptus viminalis</i> species of plant

Eucalyptus viminalis, the manna gum, ribbon gum, white gum, or viminalis, is an Australian eucalypt.

Mornington Peninsula peninsula and region of Victoria, Australia

The Mornington Peninsula is a peninsula located south-east of Melbourne, Victoria, Australia. It is surrounded by Port Phillip to the west, Western Port to the east and Bass Strait to the south, and is connected to the mainland in the north. Geographically, the peninsula begins its protrusion from the mainland in the area between Pearcedale and an area south of Frankston. The area was originally home to the Mayone-bulluk and Boonwurrung-Balluk clans and formed part of the Boonwurrung nation's territory prior to European settlement.

Ecology

The flowers of C. robinsonii exude a scent that mimics pheromones of the female thynnid wasp, which attracts male wasps that pollinate the flowers. The orchid has a symbiotic relationship with a mycorrhizal fungus that enables it to absorb nutrients. [4]

Pheromone secreted or excreted chemical factor that triggers a social response in members of the same species

A pheromone is a secreted or excreted chemical factor that triggers a social response in members of the same species. Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual, to impact the behavior of the receiving individuals. There are alarm pheromones, food trail pheromones, sex pheromones, and many others that affect behavior or physiology. Pheromones are used from basic unicellular prokaryotes to complex multicellular eukaryotes. Their use among insects has been particularly well documented. In addition, some vertebrates, plants and ciliates communicate by using pheromones.

Conservation

The population from which Carr obtained the type specimen was lost when the locality was developed in the 1990s for housing, however a second population was discovered at Rosebud in 1990. [4] Potential threats to the latter population, estimated to be around 40 plants, include weed invasion, tramping, fire and grazing by rabbits. [5] In 2010, 150 of the orchids were planted in rehabilitated areas by volunteers, utilising seed that had been propagated by the Royal Botanic Gardens, Melbourne. [6]

Type (biology) Specimen(s) to which a scientific name is formally attached

In biology, a type is a particular specimen of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralize the defining features of that particular taxon. In older usage, a type was a taxon rather than a specimen.

Rosebud, Victoria Suburb of Melbourne, Victoria, Australia

Rosebud is a seaside town on the Mornington Peninsula, Victoria, Australia approximately 75 km southeast of the Melbourne City Centre. It is nestled on the lower slopes of Arthurs Seat, the shores of Port Phillip and the plains of Boneo. Its local government area is the Shire of Mornington Peninsula. Rosebud is a very popular tourist resort with families who appreciate its sandy beaches and shallow waters.

Rabbits in Australia

European rabbits were introduced to Australia in the 18th century with the First Fleet and eventually became widespread. Such wild rabbit populations are a serious mammalian pest and invasive species in Australia causing millions of dollars of damage to crops. Their spread was enhanced probably through the emergence of strong crossbreeds.

Related Research Articles

Caladenia abbreviata, commonly known as the coastal 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, creamy-yellow flowers on a flowering stem up to 35 cm (10 in) high. Although the flowers have long, thread-like petals and sepals, they are shorter and darker than those of other spider orchids. It is a rare, relatively recently discovered species although often found near human activities.

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

Caladenia australis, commonly known as southern spider orchid, is a plant in the orchid family Orchidaceae and is endemic to Victoria, although it was also found on one Bass Strait island on one occasion in 1968. It has a single hairy leaf and usually only one creamy-yellow flower with red streaks, the flower on a hairy stalk.

Caladenia conferta, commonly known as the crowded spider orchid or coast spider-orchid, is a plant in the orchid family Orchidaceae and is endemic to a restricted area in South Australia. It is a ground orchid with a single hairy leaf, and usually a single yellowish-green flower with red markings on a wiry, hairy stalk.

Caladenia cremna, commonly known as Don's spider orchid, is a plant in the orchid family Orchidaceae and is endemic to a small area in Victoria. It is a rare ground orchid with a single hairy leaf and a single yellow flower with red striations.

<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 dienema, commonly known as the windswept spider-orchid, is a plant in the orchid family Orchidaceae and is endemic to Tasmania. It is a ground orchid with a single, hairy leaf and a single, variably-coloured, usually dark red flower on a thin, wiry stem 5–12 cm (2–5 in) high.

Caladenia flaccida, commonly known as the flaccid spider orchid, is a plant in the orchid family Orchidaceae and is endemic to eastern Australia. It is a ground orchid with a single hairy leaf and up to three cream-coloured, pinkish or red flowers with long, thread-like, glandular tips on the sepals and petals.

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

Caladenia formosa, commonly known as the large crimson spider orchid, or elegant spider orchid is a plant in the orchid family Orchidaceae and is endemic to Victoria and South Australia. It is a ground orchid with a single hairy leaf and a single crimson-coloured flower and which mainly occurs only in south-western Victoria.

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

Caladenia fragrantissima, commonly known as the scented spider orchid, is a plant in the orchid family Orchidaceae and is endemic to Victoria and South Australia. It is a ground orchid with a single hairy leaf and up to three creamy-white to yellowish-green flowers. It is possible that it is conspecific with Caladenia orientalis.

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

Caladenia fulva, commonly known as the tawny spider orchid, is a plant in the orchid family Orchidaceae and is endemic to a small area in Victoria. It is a ground orchid with a single hairy leaf and one or two creamy-white to pale yellow flowers. Only two small populations are known, although both are in nature reserves.

Caladenia hastata, commonly known as Mellblom's spider orchid is a plant in the orchid family Orchidaceae and is endemic to Victoria. It is a ground orchid with a single hairy leaf and up to three white to cream-coloured flowers with red markings on the labellum.

Caladenia helvina, commonly known as the summer spider orchid, is a plant in the orchid family Orchidaceae and is endemic to Tasmania. It is a ground orchid with a single hairy leaf and usually a single greenish-yellow to pale yellow flower with reddish teeth on the sides of the labellum and reddish calli along its mid-line.

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

Caladenia oenochila, commonly known as the red-lipped spider orchid, or wine-lipped spider orchid, is a plant in the orchid family Orchidaceae and is endemic to Victoria. It is a ground orchid with a single leaf and usually only one pale yellow-green flower with purple marks and a dark red labellum.

<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.

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

Caladenia verrucosa, commonly known as the mallee spider orchid, is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. It is a ground orchid with a single, hairy leaf and usually only one greenish-yellow and red flower.

Caladenia saxicola, commonly known as the banded ironstone 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 creamy-white to pale yellow flowers with spreading lateral sepals and petals.

Caladenia validinervia, commonly known as the Lake Muir 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 greenish to creamy white flowers with red stripes on the sepals and petals. The flowers have relatively narrow sepals and petals and a relatively small labellum. It is a rare orchid only known from an area between Rocky Gully and Collie.

Caladenia fuliginosa is a plant in the orchid family Orchidaceae and is endemic to the Yorke Peninsula in South Australia. It is a ground orchid with a single hairy leaf and a single relatively large, creamy-yellow flower, sometimes with reddish lines. The flowers have a smell resembling hot metal.

References

  1. 1 2 3 "Caladenia robinsonii". APNI. Retrieved 17 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. pp. 75–76. ISBN   1877069124.
  3. ↑ "Caladenia robinsonii". Royal Botanic Gardens Victoria: vicflora. Retrieved 17 March 2017.
  4. 1 2 3 Backhouse, Gary; Bramwells, Hugh; Musker, Ron; Walker, Gidja; Lester, Karen. "Frankston Spider Orchid (Caladenia robinsonii G.W.Carr) Recovery Plan 1999-2003". Australian Government Department of Energy and Environment. Retrieved 17 March 2017.
  5. 1 2 3 "Conservation advice Caladenia robinsonii Frankston spider-orchid" (PDF). Retrieved 17 March 2017.
  6. ↑ Smith, Bridie (21 July 2010). "Victorian plan aids orchids in danger". The Age. Melbourne. Retrieved 2010-07-21.
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