Thelymitra cornicina

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.

Lilac sun orchid
Illustration from Reichenbach's Xenia Orchidacea
Scientific 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]

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) is a Latin word meaning "having a horny sheath".[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. "Thelymitra cornicina". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  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. 245. 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. 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. "With malus towards none" (PDF). Retrieved 29 May 2018.
  7. "Thelymitra cornicina". FloraBase. Western Australian Government Department of Parks and Wildlife.
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