Diuris ostrina

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Darling Scarp donkey orchid
Diuris ostrina - Darling Scarp Donkey orchid (9911135104) - cropped.jpg
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. ostrina
Binomial name
Diuris ostrina

Diuris ostrina, commonly known as Darling Scarp 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 five brown to brownish-yellow and purple-mauve flowers.

Contents

Description

Diuris ostrina is a tuberous, perennial herb with two or three linear leaves 80–250 mm (3.1–9.8 in) long and 4–8 mm (0.16–0.31 in) wide. Up to five brown to brownish-yellow and purple-mauve flowers 32–42 mm (1.3–1.7 in) long and 25–35 mm (0.98–1.38 in) wide are borne on a flowering stem 250–400 mm (9.8–15.7 in) tall. The dorsal sepal is egg-shaped, 10–13 mm (0.39–0.51 in) long and 12–18 mm (0.47–0.71 in) wide, the lateral sepals narrowly oblong, parallel or crossed, 15–22 mm (0.59–0.87 in) long and 2.5–3.0 mm (0.098–0.118 in) wide. The petals are broadly elliptic, 15–18 mm (0.59–0.71 in) long and 9–14 mm (0.35–0.55 in) wide on a stalk 3–5 mm (0.12–0.20 in) long. The labellum is 8–12 mm (0.31–0.47 in) long with three lobes - the centre lobe broadly wedge-shaped, 8–12 mm (0.31–0.47 in) long and wide, the side lobes spread widely apart and egg-shaped to oblong, 9–12 mm (0.35–0.47 in) long and 4–6 mm (0.16–0.24 in) wide. There is a single smooth, yellow callus ridge 4–5 mm (0.16–0.20 in) long, along the mid-line of the labellum. Flowering occurs in October and November. [3] [4]

Taxonomy and naming

Diuris ostrina was first formally described in 2016 by David Jones and Christopher J. French in Australian Orchid Review, from a specimen collected in Greenmount National Park in 1997. [5] The specific epithet (ostrina) means "purple", referring to the main colour of the labellum of this species. [4] [6]

Distribution and habitat

Darling Scarp donkey orchid is restricted to the Darling Scarp where it grows in shrubby forest and woodland in the Jarrah Forest and Swan Coastal Plain bioregions of south-western Western Australia. [2] [3] [4]

Conservation

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

Related Research Articles

<i>Diuris corymbosa</i> Species of orchid

Diuris corymbosa, commonly called common donkey orchid or wallflower orchid, is a species of orchid which is endemic to the south-west of Western Australia. It is similar to the purple pansy orchid but its flowers are yellow rather than purple or mauve and it flowers earlier in the year. It also resembles the winter donkey orchid but flowers later than that species. It is one of the most common orchid species in the Perth area, often forms extensive colonies and usually has numerous flowers on the one spike.

<i>Diuris laxiflora</i> Species of orchid

Diuris laxiflora, commonly known as bee orchid, is a species of orchid which is endemic to the southwest of Western Australia. It has two to five narrowly linear leaves and up to six yellow flowers with brown markings. It is a small orchid, common within its range and about half the size of the common donkey orchid, Diuris corymbosa.

<i>Diuris punctata</i> Species of orchid

Diuris punctata, commonly known as the purple donkey orchid is a species of orchid which is endemic to south-eastern continental Australia. It has two grass-like leaves and up to ten purple or mauve flowers, often with darker, sometimes yellow marks. A yellow form from near Guyra is probably now extinct.

<i>Diuris arenaria</i> Species of orchid

Diuris arenaria, commonly known as the Tomaree donkey orchid or sand doubletail is a species of orchid which is endemic to a very small area of New South Wales. It has two grass-like leaves and up to nine mauve or light purple and white flowers. It has a very limited distribution near Newcastle.

<i>Diuris oporina</i> Species of orchid

Diuris oporina, commonly called the autumn donkey orchid or northern white donkeys tails is a species of orchid that is endemic to Queensland. It has a single tapering, linear leaf at its base and up to ten white flowers with mauve to purple markings. It grows in the drier parts of the tablelands in Far North Queensland.

<i>Diuris picta</i> Species of orchid

Diuris picta, commonly called the granite bee orchid or granite donkey orchid, is a species of orchid which is endemic to the south-west of Western Australia. It has between three and five leaves at its base and up to eight creamy-white to yellow flowers with brownish purple markings. It grows on granite outcrops between Menzies and Lake King.

<i>Diuris pulchella</i> Species of orchid

Diuris pulchella, commonly called the beautiful donkey orchid is a species of orchid that is endemic to the south-eastern part of the south-west of Western Australia. It has two or three leaves at its base and up to five bright yellow and mauve flowers described as "exquisite", "spectacular" and "attractive". It grows in shallow soil on granite outcrops near Esperance.

<i>Diuris recurva</i> Species of orchid

Diuris recurva, commonly called the mini donkey orchid is a species of orchid that is endemic to the south-west of Western Australia. It has one or two leaves at its base, up to six small pale yellow and brownish flowers and grows in winter-wet places between Badgingarra and Kalbarri.

<i>Diuris brachyscapa</i> Species of orchid

Diuris brachyscapa, commonly known as western wheatbelt donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has two or three linear leaves and a flowering stem with up to four pale yellow flowers with brown markings.

<i>Diuris hazeliae</i> Species of orchid

Diuris hazeliae, commonly known as yellow granite donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has between two and four linear leaves and up to six bright yellow and reddish-brown flowers.

<i>Diuris leopardina</i> Species of orchid

Diuris leopardina is a species of orchid that is endemic to south-eastern continental Australia. It has between two or three grass-like leaves of different lengths, and a flowering stem with up to five pale yellow to butter yellow flowers with reddish brown or purple marks and patterns, and leopard-like spots on the back.

<i>Diuris littoralis</i> Species of orchid

Diuris littoralis, commonly known as Green Range donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has two or three linear leaves and up to six yellow, brown and mauve flowers from late July to early September.

<i>Diuris oraria</i> Species of orchid

Diuris oraria, commonly known as northern coastal donkey orchid, is a species of orchid that is endemic to a small area of the north coast of Western Australia. It has two or three linear to lance-shaped leaves and up to four yellow flowers with reddish-brown and purple markings.

Diuris pallescens, commonly known as pale donkey orchid, 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 pale yellow flowers with light brown to reddish-brown markings.

<i>Diuris perialla</i> Species of orchid

Diuris perialla, commonly known as early donkey orchid, 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 four yellow flowers with reddish markings.

<i>Diuris porphyrochila</i> Species of orchid

Diuris porphyrochila, commonly known as Yalgorup donkey orchid, 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 a flowering stem with up to eight yellow flowers with brown to reddish-brown and purple markings.

<i>Diuris refracta</i> Species of orchid

Diuris refracta, commonly known as dainty donkey orchid, 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 six yellow flowers with reddish markings.

<i>Diuris suffusa</i> Species of orchid

Diuris suffusa, commonly known as mottled donkey orchid, 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.

Diuris tinctoria, commonly known as sandplain donkey orchid, 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.

<i>Diuris tinkeri</i> Species of orchid

Diuris tinkeri, commonly known as Arrowsmith donkey orchid, 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 yellow flowers suffused with reddish-purple to purple.

References

  1. "Diuris ostrina". Australian Plant Census. Retrieved 5 August 2023.
  2. 1 2 3 "Diuris ostrina". 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. 211. ISBN   9780980348149.
  4. 1 2 3 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): 38–39. Retrieved 5 August 2023.
  5. "Duiris ostrina". APNI. Retrieved 5 August 2023.
  6. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 267. ISBN   9780958034180.