Thelymitra speciosa

Thelymitra speciosa, commonly called the eastern Queen of Sheba,[2] is a species of orchid in the family Orchidaceae and endemic to the south-west of Western Australia. It has a single erect, spiral, dark green leaf with a purplish base and one or two glossy, purplish flowers with broad reddish edges and yellowish margins. There are two bright yellow or orange arms on the sides of the column.

Eastern Queen of Sheba
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Thelymitra
Species:
T. speciosa
Binomial name
Thelymitra speciosa
Jeanes[1]

Description

Thelymitra speciosa is a tuberous, perennial herb with an erect, dark green leaf which is egg-shaped near its purplish base, then suddenly narrows to a linear, channelled, spiral leaf 30–70 mm (1–3 in) long and 4–7 mm (0.2–0.3 in) wide. One or two glossy, purplish flowers with broad reddish edges and yellowish margins, 30–50 mm (1.2–2.0 in) wide are borne on a flowering stem 100–200 mm (4–8 in) tall. The sepals and petals are 15–25 mm (0.6–1 in) long and 6–10 mm (0.2–0.4 in) wide. The column is purplish, 5–7 mm (0.2–0.3 in) long and about 2 mm (0.08 in) wide with a cluster of small finger-like glands on its back. There are two bright yellow or orange ear-like arms on the sides of the column. The flowers are insect pollinated and open widely on hot days. Flowering occurs in August and September.[2][3][4][5]

Taxonomy and naming

Thelymitra speciosa was first formally described in 2009 by Jeff Jeanes and the description was published in Muelleria.[6] The specific epithet (speciosa) is a Latin word meaning "showy" or "splendid ",[7] referring to this " very spectacular and showy species".[5]

Distribution and habitat

The eastern Queen of Sheba grows with dense shrubs in winter-wet areas between the Stirling Ranges and Lake Grace in the Avon Wheatbelt, Esperance Plains and Mallee biogeographic regions.[2][3][4][8]

Conservation

Thelymitra speciosa is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[8]

References
  1. "Thelymitra pulcherrima". 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. 255. 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. 425. ISBN 9780980296457.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 306. ISBN 9780646562322.
  5. Jeanes, Jeffrey A. (2009). "Resolution of the Thelymitra variegata (Orchidaceae) complex of southern Australia and New Zealand" (PDF). Muelleria. 27 (2): 166–168. Retrieved 9 June 2018.
  6. "Thelymitra speciosa". APNI. Retrieved 9 June 2018.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 273.
  8. "Thelymitra speciosa". FloraBase. Western Australian Government Department of Parks and Wildlife.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.