Diuris insignis

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Dark bee orchid
Diuris insignis.jpg
Near Lake Muir
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Diuris
Species:
D. insignis
Binomial name
Diuris insignis

Diuris insignis, commonly known as dark bee orchid, [2] is a species of orchid that is endemic to the south-west of Western Australia. It has between two and six narrowly linear to thread-like leaves and up to five yellow flowers with many dark red markings.

Contents

Description

Diuris insignis is a tuberous, perennial herb with between two and six narrowly linear to thread-like leaves 60–150 mm (2.4–5.9 in) long and 1–2 mm (0.039–0.079 in) wide. Up to five yellow flowers with dark red markings, 15–20 mm (0.59–0.79 in) long and wide are borne on a flowering stem 200–400 mm (7.9–15.7 in) tall. The dorsal sepal is narrowly egg-shaped to narrowly elliptic, 8–13 mm (0.31–0.51 in) long and 4.5–8.5 mm (0.18–0.33 in) wide. The lateral sepals are parallel or crossed near the tip, 9–14 mm (0.35–0.55 in) long, 1.5–3 mm (0.059–0.118 in) wide and project forwards. The petals are more or less erect or curved backwards and paddle-shaped, 6–10 mm (0.24–0.39 in) long and 5–9 mm (0.20–0.35 in) wide on a reddish-brown stalk 3–5 mm (0.12–0.20 in) long. The labellum is 7–11 mm (0.28–0.43 in) long with three lobes - the centre lobe broadly wedge-shaped, 7.0–10.5 mm (0.28–0.41 in) long and wide. The side lobes spread widely apart and are oblong, 5–7 mm (0.20–0.28 in) long and 2–4 mm (0.079–0.157 in) wide. There are two smooth, yellow calli ridges heavily marked with dark red near the mid-line of the labellum. Flowering occurs in October and early November. [3] [4] [5]

Taxonomy and naming

Diuris insignis was first formally described in 2013 by David Jones and Christopher J. French in Australian Orchid Review, from a specimen collected by Jones near Muir Highway, 17 km (11 mi) west of the Frankland River crossing in 1985. [6] The specific epithet (insignis) means "remarkable" or "notable", in reference to the appearance of the flowers. [4]

Distribution and habitat

Dark bee orchid grows in moist grassland and sedgeland in winter-wet flats and around swamps between Mount Barker and Manjimup in the Jarrah Forest bioregion of south-western Western Australia. [2] [3] [4]

Conservation

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

References

  1. ↑ "Diuris insignis". Australian Plant Census. Retrieved 29 June 2023.
  2. 1 2 3 "Diuris insignis". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. 1 2 Brown, Andrew; Dixon, Kingsley; French, Christopher; Hopper, Stephen (2008). Orchids of Western Australia. Crawley, Western Australia: University of Western Australia Press. p. 226. ISBN   9780980348149.
  4. 1 2 3 Jones, David L.; French, Christopher J. (2013). "The characterisation of Diuris laxiflora Lindl. and the description of four new allied species from Western Australia". Australian Orchid Review. 78 (1): 28–29. Retrieved 29 June 2023.
  5. ↑ Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 480. ISBN   9780646562322.
  6. ↑ "Diuris insignis". APNI. Retrieved 29 June 2023.
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