Diuris_suffusa

<i>Diuris suffusa</i>

Diuris suffusa

Species of orchid

Diuris suffusa, commonly known as mottled 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 up to seven cream-coloured to creamy-yellow flowers with light brown to reddish-brown markings.

Quick Facts Diuris suffusa, Scientific classification ...

Description

Diuris suffusa is a tuberous, perennial herb with two or three linear to lance-shaped leaves 100–200 mm (3.9–7.9 in) long and 4–10 mm (0.16–0.39 in) wide. Up to seven cream-coloured to creamy-yellow flowers with light brown to reddish-brown markings, 20–27 mm (0.79–1.06 in) long and 15–25 mm (0.59–0.98 in) wide are borne on a flowering stem 150–300 mm (5.9–11.8 in) tall. The dorsal sepal is egg-shaped, 5–8 mm (0.20–0.31 in) long, 7–10 mm (0.28–0.39 in) wide and curved backwards, the lateral sepals narrowly oblong, turned back and crossed, 9–16 mm (0.35–0.63 in) long and 1.5–3 mm (0.059–0.118 in) wide. The petal blades are oblong to elliptic, 8–13 mm (0.31–0.51 in) long and 5–8 mm (0.20–0.31 in) wide on a stalk 3.0–4.5 mm (0.12–0.18 in) long. The labellum is 4–6 mm (0.16–0.24 in) long with three lobes - the centre lobe wedge-shaped, 4–6 mm (0.16–0.24 in) long and 5–6 mm (0.20–0.24 in) wide, the side lobes spread widely apart and oblong, 4–6 mm (0.16–0.24 in) long and 3–4 mm (0.12–0.16 in) wide. There is a single smooth, yellow callus ridge 3–4 mm (0.12–0.16 in) long, along the mid-line of the labellum. Flowering occurs from late August to late September.[2][3][4]

Taxonomy and naming

Diuris suffusa was first formally described in 2016 by David Jones and Christopher J. French in Australian Orchid Review, from a specimen collected by French near the Trayning to Bencubbin road in 1999.[5] The specific epithet (suffusa) means "suffused" or "tinged", referring to the pale colour of the flowers, tinged with darker colours.[4]

Distribution and habitat

Mottled donkey orchid grows in low shrubland and shrubby woodland in the area between Bencubbin, Trayning, Wyalkatchem and Koorda in the Avon Wheatbelt and Coolgardie bioregions of south-western Western Australia.[2][3][4]

Conservation

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

References

  1. [1]
    "Diuris suffusa". Australian Plant Census. Retrieved 15 August 2023.
  2. [2]
    "Diuris suffusa". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. [3]
    Brown, Andrew; Dixon, Kingsley; French, Christopher; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 217. ISBN 9780980348149.
  4. [4]
    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 15 August 2023.
  5. [5]
    "Duiris suffusa". APNI. Retrieved 15 August 2023.
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