Caladenia pectinata

Caladenia pectinata, commonly known as the king 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 large red, yellow and pale green flowers. It is especially common between Bremer Bay and Rocky Gully.

King spider orchid
Caladenia pectinata growing in Mount Barker
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Caladenia
Species:
C. pectinata
Binomial name
Caladenia pectinata
Synonyms[1]
  • Caladenia huegelii Rchb.f.
  • Arachnorchis pectinata (R.S.Rogers) D.L.Jones & M.A.Clem.
  • Calonema pectinatum (R.S.Rogers) Szlach.
  • Calonemorchis pectinata (R.S.Rogers) Szlach.

Description

Caladenia pectinata is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, 150–300 mm (6–10 in) long and 10–20 mm (0.4–0.8 in) wide. Up to three red, yellow and pale green flowers 60–100 mm (2–4 in) long and 60–70 mm (2–3 in) wide are borne on a stalk 350–700 mm (10–30 in) tall. The sepals have thick, brown, club-like glandular tips 10–35 mm (0.4–1 in) long. The dorsal sepal is erect, 40–70 mm (2–3 in) long and 2–5 mm (0.08–0.2 in) wide. The lateral sepals are 40–70 mm (2–3 in) long and 6–9 mm (0.2–0.4 in) wide and turn downwards. The petals are 35–45 mm (1–2 in) long, 3–4 mm (0.1–0.2 in) wide and are sometimes spreading otherwise turn upwards. The labellum is 18–25 mm (0.7–1 in) long, 12–18 mm (0.5–0.7 in) wide and creamy-yellow with a dark red, down-curved tip. The sides of the labellum have linear teeth up to 8 mm (0.3 in) long and there are four or six rows of dark red calli along its mid-line. Flowering is from late September to October.[2][3][4]

Taxonomy and naming

Caladenia pectinata was first formally described by Richard Rogers in 1920 and the description was published in Transactions and Proceedings of the Royal Society of South Australia.[1][5] The specific epithet (pectinata) is a Latin word meaning "comb-like"[6] referring to the fringe on the sides of the labellum.[3]

Distribution and habitat

The king spider orchid is widespread between Cataby and Munglinup in the Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain, and Warren biogeographic regions. It is most common between Bremer Bay and Rocky Gully.[2][3][4][7]

Conservation

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

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References
  1. "Caladenia pectinata". APNI. Retrieved 1 March 2017.
  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. 83. ISBN 1877069124.
  3. Brown, Andrew; Dundas, Pat; Dixon, Kingsley; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 106. ISBN 9780980296457.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 137. ISBN 9780646562322.
  5. "Proceedings and Transactions of the Royal Society of South Australia". p. 352. Retrieved 1 March 2017.
  6. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 593.
  7. "Caladenia pectinata". FloraBase. Western Australian Government Department of Parks and Wildlife.
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