Glaucous 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. planicola
Binomial name
Thelymitra planicola
Jeanes[1]

Thelymitra planicola, commonly called the glaucous sun orchid,[2] is a species of orchid that is endemic to southern eastern Australia. It has a single erect, leathery, channelled, dark green leaf and up to twelve blue flowers with darker veins. The plant has a bluish green hue and the flowers are self-pollinating, only opening widely on hot days.

Description

Thelymitra peniculata is a glaucous, tuberous, perennial herb with a single erect, dark green, leathery, channelled, linear to lance-shaped leaf 100–300 mm (4–10 in) long and 5–20 mm (0.2–0.8 in) wide with a purplish base. Between two and twelve medium blue flowers with darker veins, 15–25 mm (0.6–1 in) wide are arranged on a flowering stem 220–450 mm (9–20 in) tall. The sepals and petals are 10–15 mm (0.4–0.6 in) long and 4–8 mm (0.2–0.3 in) wide. The column is white to pale blue, 5–6 mm (0.20–0.24 in) long and 3–4 mm (0.1–0.2 in) wide. The lobe on the top of the anther is dark blackish brown with a brown band and a yellow tip, tubular and gently curved with a slightly notched tip. The side lobes are parallel to each other and have toothbrush-like tufts of white hairs. Flowering occurs in October and November but the flowers are self-pollinating and only open fully on hot days.[2][3][4]

Taxonomy and naming

Thelymitra planicola was first formally described in 2000 by Jeff Jeanes from a specimen collected near Golden Beach and the description was published in Muelleria .[5] The specific epithet (planicola) is derived from the Latin word planus meaning "even", "flat" or "level" [6]: 474  and the suffix -cola meaning "dweller",[6]: 217  referring to the plain-dwelling preference of this orchid.[3]

Distribution and habitat

The glaucous sun orchid grows in grassland and grassy forest in scattered populations in New South Wales and Victoria.[2][3][4]

References

  1. ↑ "Thelymitra planicola". 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. 236. ISBN 1877069124.
  3. 1 2 3 Jeanes, Jeffrey A. (2000). "Two new species of Thelymitra (Orchidaceae) from southeastern Australia" (PDF). Muelleria. 14: 94–96. Retrieved 21 May 2018.
  4. 1 2 Jeanes, Jeff; Stajsic, Val. "Thelymitra planicola". Royal Botanic Gardens Victoria. Retrieved 21 May 2018.
  5. ↑ "Thelymitra planicola". APNI. Retrieved 21 May 2018.
  6. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
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