Thelymitra luteocilium

Thelymitra luteocilium, commonly called the fringed sun orchid,[2] is a species of orchid that is endemic to south-eastern Australia. It has a single fleshy, dark green leaf and up to six pale pink to reddish flowers with a short wavy lobe on top of the column.

Fringed sun orchid
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Thelymitra
Species:
T. luteocilium
Binomial name
Thelymitra luteocilium

Description

Thelymitra luteocilium is a tuberous, perennial herb with a single fleshy, channelled, dark green, linear to lance-shaped leaf 100–200 mm (4–8 in) long and 5–8 mm (0.2–0.3 in) wide. Between two and six pale pink to reddish flowers 15–20 mm (0.6–0.8 in) wide are arranged on a flowering stem 150–350 mm (6–10 in) tall. The sepals and petals are 7–10 mm (0.3–0.4 in) long and 5–6 mm (0.20–0.24 in) wide. The column is pink to reddish, 4–5 mm (0.16–0.20 in) long and about 3 mm (0.1 in) wide. The lobe on the top of the anther has a dense fringe and a yellow tip with a dark collar. The side lobes have dense, yellow, mop-like tufts on their ends. The flowers are self-pollinated and open only slowly on hot, humid days. Flowering occurs from August to October.[2][3][4]

Taxonomy and naming

Thelymitra luteocilium was first formally described in 1882 by Robert Fitzgerald and the description was published in The Gardeners' Chronicle.[5][6] The specific epithet (luteocilium) is derived from the Latin words luteus meaning "yellow"[7]:102 and cilium meaning "eyelash".[7]:390

Distribution and habitat

The fringed sun orchid mostly grows near low shrubs in forest and scrubland in central-western Victoria and eastern South Australia.[2][3][4]

References
  1. "Thelymitra luteocilium". 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. 246. ISBN 1877069124.
  3. Ohlsen, Daniel. "Thelymitra circumsepta". Royal Botanic Gardens Victoria. Retrieved 30 May 2018.
  4. "Thelymitra luteocilium". State Herbarium of South Australia. Retrieved 30 May 2018.
  5. "Thelymitra luteocilium". APNI. Retrieved 30 May 2018.
  6. Fitzgerald, Robert D. (1882). "New Australian orchids". The Gardeners' Chronicle. 17 (433): 495. Retrieved 30 May 2018.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
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