Thelymitra uliginosa

Thelymitra uliginosa, commonly called southern curly locks[2] or swamp curly locks,[3] is a species of orchid in the family Orchidaceae and endemic to the south-west of Western Australia. It has a single erect leaf, spiralling around the flowering stem and a single small pink, mauve, blue or purplish flower with darker veins and sometimes darker blotches. There are two narrow, yellow arms on the sides of the column.

Southern curly locks
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Thelymitra
Species:
T. uliginosa
Binomial name
Thelymitra uliginosa
Jeanes[1]

Description

Thelymitra uliginosa is a tuberous, perennial herb with a dark green leaf which is egg-shaped near the purplish base, then suddenly narrows to a linear, curved or spirally twisted upper part. The upper part is 30–80 mm (1–3 in) long and 2–3 mm (0.08–0.1 in) wide. There is usually only a single pink, mauve, blue or purplish flower with darker veins and sometimes darker blotches, 15–20 mm (0.6–0.8 in) wide borne on a flowering stem 100–200 mm (4–8 in) tall. The sepals and petals are 7–10 mm (0.3–0.4 in) long and 3–5 mm (0.1–0.2 in) wide. The column is a similar colour to the petals, about 3 mm (0.1 in) long and 2 mm (0.08 in) wide with a cluster of small glands on its back. There are two narrow yellow arms on the sides of the column. The flowers are self-pollinating, short-lived and only open on hot days. Flowering occurs in August and September and more prolifically after fire.[2][3][4][5]

Taxonomy and naming

Thelymitra uliginosa was first formally described in 2009 by Jeff Jeanes from a specimen collected in the Walpole-Nornalup National Park and the description was published in Muelleria.[5][6] The specific epithet (uliginosa) is a Latin word meaning "full of moisture", "wet" or "marshy"[7] referring to the habitat preference of this species.[5]

Distribution and habitat

Southern curly locks grows in shrubby vegetation in and around winter-wet areas and swamps. It is found mainly between Northcliffe and Mount Manypeaks but there are disjunct populations near Perth and Esperance, in the Esperance Plains, Jarrah Forest and Warren biogeographic regions.[2][3][4][8]

Conservation

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

References
  1. "Thelymitra uliginosa". 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. 426. 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. p. 254. ISBN 1877069124.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 304. ISBN 9780646562322.
  5. Jeanes, Jeffrey A. (2009). "Resolution of the Thelymitra variegata (Orchidaceae) complex of southern Australia and New Zealand" (PDF). Muelleria. 27 (2): 159–160. Retrieved 8 June 2018.
  6. "Thelymitra uliginosa". APNI. Retrieved 9 June 2018.
  7. Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 854.
  8. "Thelymitra uliginosa". FloraBase. Western Australian Government Department of Parks and Wildlife.
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