Thelymitra latiloba

Thelymitra latiloba, commonly called the wandoo sun orchid[2] or wandoo shirt orchid,[3] is a species of orchid in the family Orchidaceae and endemic to the south-west of Western Australia. It has a single erect, fleshy, channelled, dark green leaf and up to twelve blue flowers with darker blue veins and sometimes flushed with mauve. The lobe on top of the anther is wavy.

Yellow tufted sun orchid
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. latiloba
Binomial name
Thelymitra latiloba
Jeanes[1]

Description

Thelymitra latiloba is a tuberous, perennial herb with a single erect, fleshy, channelled, dark green, linear to lance-shaped leaf 150–300 mm (6–10 in) long and 3–12 mm (0.1–0.5 in) wide with a purplish base. Up to twelve blue flowers with darker blue lines and often flushed with mauve, 13–27 mm (0.5–1 in) wide are borne on a flowering stem 80–600 mm (3–20 in) tall. The sepals and petals are 8–22 mm (0.3–0.9 in) long and 3–9 mm (0.1–0.4 in) wide. The column is whitish or pale blue, 3.5–5.5 mm (0.1–0.2 in) long and 2–3 mm (0.079–0.12 in) wide. The lobe on the top of the anther is dark purplish black with a wavy white or pink tip. The side lobes have mop-like tufts of purple or white hairs. The flowers are insect pollinated and open on hot days. Flowering occurs from September to November.[2][3][4][5]

Taxonomy and naming

Thelymitra latiloba was first formally described in 2001 by Jeff Jeanes and the description was published in Muelleria from a specimen collected near Brookton.[6] The specific epithet (latiloba) is derived from the Latin words latus meaning "broad" or "wide"[7]: 166  and lobus meaning "a lobe",[7]: 493  referring to the broad side lobes on the column.[5]

Distribution and habitat

The wandoo sun orchid often grows in thick layers of leaf litter in wandoo forest and woodland and is found between Wongan Hills and Dumbleyung in the Avon Wheatbelt, Jarrah Forest and Mallee biogeographic regions.[2][3][8]

Conservation

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

References
  1. "Thelymitra latiloba". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. Brown, Andrew; Dundas, Pat; Dixon, Kingsley; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 431. ISBN 9780980296457.
  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. 244–245. ISBN 1877069124.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 311. ISBN 9780646562322.
  5. Jeanes, Jeffrey A. (2001). "Resolution of the Thelymitra canaliculata R.Br. (Orchidaceae) complex in southern Australia" (PDF). Muelleria. 15: 83–85. Retrieved 22 May 2018.
  6. "Thelymitra latiloba". APNI. Retrieved 29 May 2018.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  8. "Thelymitra latiloba". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
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