Lilac sun orchid
Illustration from Reichenbach's Xenia Orchidacea
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Thelymitra
Species:
T. cornicina
Binomial name
Thelymitra cornicina
Synonyms[1]

Thelymitra cornicina, commonly called the lilac sun orchid,[2] is a species of orchid in the family Orchidaceae and is endemic to the south-west of Western Australia. It has a single narrow, pale green leaf and up to eight lilac-tinged blue flowers with the lobe on top of the anther covered with short, finger-like calli.

Description

Thelymitra cornicina is a tuberous, perennial herb with a single pale green leaf 100–200 mm (4–8 in) long and 3–5 mm (0.1–0.2 in) wide. Up to eight pale blue to dark blue flowers with a lilac tinge, 25–30 mm (0.98–1.2 in) wide are borne on a flowering stem 200–500 mm (8–20 in) tall. The sepals and petals are 10–15 mm (0.4–0.6 in) long and 6–8 mm (0.2–0.3 in) wide. The column is blue with a yellow crest, 3.5–4.5 mm (0.1–0.2 in) long and about 2 mm (0.08 in) wide. The lobe on the top of the anther is short and densely covered with short, finger-like yellow glands. The side lobes have mop-like tufts of a few white to lilac hairs. The flowers are insect pollinated and open on sunny days. Flowering occurs from September to November.[2][3][4]

Taxonomy and naming

Thelymitra cornicina was first formally described in 1871 by Heinrich Gustav Reichenbach and the description was published in Beitrage zur Systematischen Pflanzenkunde.[5] The specific epithet (cornicina) means "horn-blower", hence "horn-shaped", referring to the column.[3][6]

Distribution and habitat

The lilac sun orchid grows in scrubland and forest between Perth and Hopetoun in the Esperance Plains, Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions.[2][3][7]

Conservation

Thelymitra cornicina is classified as "not threatened" in Western Australia by the Western Australian Government Department of Parks and Wildlife.[7]

References

  1. 1 2 "Thelymitra cornicina". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. 1 2 3 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 245. 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. 433. ISBN 9780980296457.
  4. ↑ Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 313. ISBN 9780646562322.
  5. ↑ "Thelymitra cornicina". APNI. Retrieved 29 May 2018.
  6. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 170. ISBN 9780958034180.
  7. 1 2 "Thelymitra cornicina". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
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