Diuris tinctoria

Diuris tinctoria
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Diuris
Species:
D. tinctoria
Binomial name
Diuris tinctoria

Diuris tinctoria, commonly known as sandplain donkey orchid,[2] is a species of orchid that is endemic to the south-west of Western Australia. It has two or three linear to lance-shaped leaves and two to five pale yellow flowers suffused with light brown.

Description

Diuris tinctoria is a tuberous, perennial herb with two or three linear to lance-shaped leaves 100–300 mm (3.9–11.8 in) long and 4–12 mm (0.16–0.47 in) wide. Between two and five pale yellow flowers suffused with light brown, 30–40 mm (1.2–1.6 in) wide are borne on a flowering stem 200–600 mm (7.9–23.6 in) high. The dorsal sepal is reddish-brown, elliptic, 10–12 mm (0.39–0.47 in) long and 10–14 mm (0.39–0.55 in) wide with irregular teeth on the edges, the lateral sepals narrowly oblong to sword-shaped, parallel or crossed, 15–24 mm (0.59–0.94 in) long and 2–3 mm (0.079–0.118 in) wide. The petal blades are oblong to egg-shaped, 12–20 mm (0.47–0.79 in) long and 8–12 mm (0.31–0.47 in) wide on a stalk 4.5–6 mm (0.18–0.24 in) long. The labellum is 8–10 mm (0.31–0.39 in) long with three lobes - the centre lobe wedge-shaped, 7–9 mm (0.28–0.35 in) long and 6–9 mm (0.24–0.35 in) wide, the side lobes spread widely apart and oblong to egg-shaped, 7–10 mm (0.28–0.39 in) long and 4–6 mm (0.16–0.24 in) wide. There is a single smooth, yellow callus ridge 5–7 mm (0.20–0.28 in) long with dark reddish-brown edges, along the mid-line of the labellum. Flowering occurs from early September to October.[2][3][4]

Taxonomy and naming

Diuris tinctoria was first formally described in 2016 by David Jones and Christopher J. French in Australian Orchid Review, from a specimen collected near Yabberup in the Shire of Donnybrook–Balingup in 1997.[5] The specific epithet (tinctoria) means "tinged" or "dyed", referring to the colour patterns of the flowers.[4]

Distribution and habitat

Sandplain donkey orchid grows in woodland and forest in sand over limestone, from Lake Clifton to Bunbury in the Jarrah Forest and Swan Coastal Plain bioregions of south-western Western Australia.[2][3][4]

Conservation

Diuris tinctoria is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.[2]

References

  1. ^ "Diuris tinctoria". Australian Plant Census. Retrieved 18 August 2023.
  2. ^ a b c d "Diuris tinctoria". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. ^ a b Brown, Andrew; Dixon, Kingsley; French, Christopher; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 216. ISBN 9780980348149.
  4. ^ a b c Jones, David L.; French, Christopher J. (2016). "Eight new species in the Diuris corymbosa Lindley complex (Orchidaceae) from Western Australia". Australian Orchid Review. 81 (2): 43–44. Retrieved 18 August 2023.
  5. ^ "Duiris tinctoria". APNI. Retrieved 18 August 2023.

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