Caladenia intuta

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Hardwicke spider orchid
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Caladenia
Species:
C. intuta
Binomial name
Caladenia intuta
Synonyms [2]

Arachnorchis intuta D.L.Jones

Caladenia intuta is a plant in the orchid family Orchidaceae and is endemic to two small areas on the Yorke Peninsula in South Australia. It is a ground orchid with a single hairy leaf and one or two white flowers which sometimes have faint reddish lines.

Contents

Description

Caladenia intuta is a terrestrial, perennial, deciduous, herb with an underground tuber and a single narrow lance-shaped leaf, 80–150 mm (3–6 in) long and 5–11 mm (0.2–0.4 in) wide with purple blotches near its base. The leaf and the flowering stem are densely covered with hairs. One or two white flowers, sometimes with faint reddish lines and 45–65 mm (2–3 in) wide are borne on a wiry flowering stem 100–350 mm (4–10 in) tall. The sepals have thin blackish tips. The dorsal sepal is 32–40 mm (1–2 in) long, 2.5–3 mm (0.098–0.12 in) wide and the lateral sepals are 32–40 mm (1–2 in) long, 4.5–6 mm (0.18–0.24 in) wide and spread stiffly apart from each other. The petals are 27–35 mm (1.1–1.4 in) long, 2–3 mm (0.08–0.1 in) wide and also spread stiffly apart from each other. The labellum is lance-shaped to egg-shaped, 13–16 mm (0.5–0.6 in) long, 7–11 mm (0.3–0.4 in) wide and has many short, white or purplish teeth on the edges. The tip of the labellum curls downward and there are four rows of white or purplish calli shaped like hockey sticks along the mid-line of the labellum. Flowering occurs from August to September. [3] [4]

Taxonomy and naming

Caladenia intuta was first formally described in 2005 by David Jones, who gave it the name Arachnorchis intuta and published the description in The Orchadian from a specimen collected near Hardwicke Bay. [5] It had previously been known as Caladenia sp. "Brentwood'. [6] In 2008, Robert Bates changed the name to Caladenia intuta. [1] [7]

Distribution and habitat

This spider orchid is only known from two sites with a total population estimated in 2006 to be about 400 mature individuals growing in woodland. [4]

Conservation

Caladenia intuta is classified as "Critically Endangered" under the Commonwealth Government Environment Protection and Biodiversity Conservation Act 1999 (EPBC) Act. The main threats to the species are weed invasion, grazing by sheep and vegetation clearance. [4]

Related Research Articles

Caladenia aestiva, commonly known as summer spider orchid, is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. It is a ground orchid which grows singly or in small groups in the Australian Capital Territory and Victoria. It has one or two greenish-yellow to pale yellow flowers, often while the single, hairy leaf withers.

Caladenia amoena, commonly known as the charming spider orchid, is a plant in the orchid family, Orchidaceae, and is endemic to Victoria. It is a ground orchid which grows singly or in small groups, has a single dark green, hairy leaf and a single yellowish-green flower with red stripes. It is only known from a few sites and has been classified as Endangered.

<i>Caladenia ampla</i> Species of orchid

Caladenia ampla, commonly known as the dainty 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 a single flower which is sometimes yellowish-green flower with red stripes and sometimes entirely red.

Caladenia ancylosa, commonly known as the Genoa 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 a single cream-coloured flower with red markings.

<i>Caladenia clavescens</i> Species of orchid

Caladenia clavescens is a plant in the orchid family Orchidaceae and is endemic to central Victoria in Australia. It is a ground orchid with a single hairy leaf and usually a single dark red to maroon flower.

Caladenia colorata, commonly known as coloured spider-orchid, small western spider-orchid and painted spider-orchid is a plant in the orchid family Orchidaceae and is endemic to South Australia and possibly Victoria. It is a ground orchid with a single hairy leaf, and usually a single creamy-green flower with blood-red or purple-brown markings and with dark tips on the petals and sepals.

Caladenia leptochila subsp. dentata, commonly known as the toothed spider orchid, narrow-lipped spider-orchid or narrow-lipped caladenia, is a plant in the orchid family Orchidaceae and is endemic to South Australia. It has a single leaf and one or two mostly reddish-brown flowers. It differs from subspecies leptochila in the colour of its flowers, toothed edges to its labellum, and its distribution.

Caladenia leptoclavia, commonly known as the thin-clubbed spider orchid, is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It is a ground orchid with a single hairy leaf and a single pale cream-coloured to yellow flower with dark reddish stripes.

Caladenia peisleyi is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. It is a ground orchid with a single leaf and a single greenish-yellow flower with pale red stripes. It is difficult to distinguish from several other Caladenia species.

Caladenia armata is a plant in the orchid family Orchidaceae and is endemic to the Australian Capital Territory. It has a single dull green leaf with purple blotches near the base, and a single cream-coloured to pink flower with red to maroon markings. It is only known from a single population containing fewer than ten plants.

Caladenia branwhitei, commonly known as the Bethungra spider orchid, is a plant in the orchid family Orchidaceae and is endemic to southern New South Wales. It has a single dull green leaf and one or two, usually dark red to maroon-coloured flowers. It is only known from three areas near Bethungra where it grows in ironbark forest.

Caladenia cadyi is a plant in the orchid family Orchidaceae and is endemic to the south coast of New South Wales. It has a single dull green leaf with purple blotches near the base, and a single greenish cream to cream flower with pink to reddish markings. It was only known from a single population which has been bulldozed and replaced with a pine plantation so that it is now probably extinct.

Caladenia ensigera is a plant in the orchid family Orchidaceae and is endemic to South Australia. It is a ground orchid with a single leaf and one or two greenish cream to whitish green flowers and is only known from Alligator Gorge in the Mount Remarkable National Park.

Caladenia saxatilis is a plant in the orchid family Orchidaceae and is endemic to South Australia. It is a ground orchid with a single hairy leaf and one or two pale creamy-green flowers, sometimes with thin reddish lines. It occurs in the southern Flinders Ranges.

Caladenia whiteheadii is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It is a ground orchid with a single hairy leaf and a single pale yellow flower with thick reddish tips on the sepals and petals. It is only known from a single hill near Eugowra.

<i>Caladenia orestes</i> Species of plant

Caladenia orestes is a plant in the orchid family Orchidaceae and is endemic to an area in the south of New South Wales. It is a ground orchid with a single leaf and one or two cream-coloured to light reddish flowers. It grows in forest on hillsides around Burrinjuck.

Caladenia flindersica is a plant in the orchid family Orchidaceae and is endemic to South Australia. It is a ground orchid with a single leaf and one or two cream-coloured flowers with thin dark red to blackish tips on the petals and sepals. It is only known from Alligator Gorge in the Mount Remarkable National Park.

Caladenia strigosa is a plant in the orchid family Orchidaceae and is endemic to South Australia. It is a ground orchid with a single leaf and a single greenish-cream flower with fine reddish streaks. It grows in sandy soil in shrubland.

Caladenia zephyra is a plant in the orchid family Orchidaceae and is endemic to South Australia. It is a ground orchid with a single, densely hairy leaf and a single cream-coloured to very pale yellow flower with blackish glandular hairs on the sepals and petals. It occurs on the Eyre Peninsula but may have a wider distribution.

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 "Caladenia intuta". APNI. Retrieved 11 February 2018.
  2. "Caladenia intuta". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  3. Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. pp. 56–57. ISBN   1877069124.
  4. 1 2 3 Quarmby, Joe. "Recovery Plan for Twelve Threatened Orchids in the Lofty Block Region of South Australia 2010" (PDF). Australian Government Department of the Environment. Retrieved 11 February 2018.
  5. "Arachnorchis intuta". APNI. Retrieved 11 February 2018.
  6. "Arachnorchis intuta". APNI. Retrieved 11 February 2018.
  7. Bates, Robert John (2008). "New combinations in Pterostylis and Caladenia and other name changes in the Orchidaceae of South Australia" (PDF). Journal of the Adelaide Botanic Garden. 22: 102. Retrieved 9 February 2018.