Diuris purdiei

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Purdie's donkey orchid
Diuris purdiei.jpg
Diuris purdiei near Armadale
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Diurideae
Genus: Diuris
Species:
D. purdiei
Binomial name
Diuris purdiei

Diuris purdiei, commonly known as Purdie's donkey orchid, [2] is a species of orchid that is endemic to the south-west of Western Australia. It has between five and ten leaves at its base and up to eight pale yellow flowers with reddish-brown or purplish markings. It mainly grows in swampy areas and only flowers after fires the previous summer.

Contents

Description

Diuris purdiei is a tuberous, perennial herb with between five and ten spirally twisted leaves in a tuft near its base. Each leaf is 50–100 mm (2–4 in) long, 2–3 mm (0.08–0.1 in) wide. Up to eight pale yellow flowers with reddish brown or purplish markings near the centre, 20–30 mm (0.8–1 in) long and 20–35 mm (0.8–1 in) wide are borne on a flowering stem 150–350 mm (6–10 in) tall. The dorsal sepal is more or less erect or curved backwards, 10–12 mm (0.4–0.5 in) long and 4–5 mm (0.16–0.20 in) wide. The lateral sepals are 14–17 mm (0.6–0.7 in) long, about 2 mm (0.08 in) wide and turned downwards. The petals spread widely apart from each other, almost held horizontally with an egg-shaped blade 8–10 mm (0.3–0.4 in) long and 7–9 mm (0.3–0.4 in) wide on a reddish brown stalk 4–5 mm (0.16–0.20 in) long. The labellum is 15–18 mm (0.6–0.7 in) long and has three lobes. The centre lobe is heart-shaped, 10–12 mm (0.4–0.5 in) wide and the side lobes are 4–5 mm (0.16–0.20 in) long and about 2 mm (0.08 in) wide with serrated edges. There are two ridge-like calli 6–7 mm (0.2–0.3 in) in the centre of the labellum near its base. Flowering occurs in September and October. [2] [3] [4]

Taxonomy and naming

Diuris purdiei was first formally described in 1903 by Ludwig Diels from a specimen collected near Cannington, and the description was published in Journal and Proceedings of the Mueller Botanic Society of Western Australia. [5] [6] The specific epithet (purdiei) honours the New Zealand born academic, Alex Purdie who collected the type specimen. [5] [7]

Distribution and habitat

Purdie's donkey orchid grows in winter-wet swamps under dense shrubs and is found between Perth and Yarloop in the Jarrah Forest and Swan Coastal Plain biogeographic regions. [3] [8]

Conservation

Diuris purdiei is classified as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and as "Threatened Flora (Declared Rare Flora — Extant)" by the Department of Environment and Conservation (Western Australia). [8] The population of this orchid has been fragmented by urbanisation and the current threats to the species are habitat loss and weed invasion. [9]

Related Research Articles

Diuris carinata, commonly known as the tall bee orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has between four and six leaves and up to seven large, bright yellow flowers with reddish-brown markings.

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

Diuris porrifolia, commonly called the small-flowered donkey orchid is a species of orchid which is endemic to the south-west of Western Australia. It has two or three leaves and up to seven yellow flowers with brown or reddish markings. It is similar to the common donkey orchid but its flowers are smaller and it has a more easterly distribution.

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

Diuris drummondii, commonly known as the tall donkey orchid is a species of orchid which is endemic to the south-west of Western Australia. It is the tallest Diuris and is distinguished from the similar Diuris emarginata by its larger, more widely spaced flowers. The flowers are pale yellow with brown markings.

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

Diuris orientis, commonly called the wallflower orchid or eastern wallflower orchid, is a species of orchid which is endemic to eastern Australia. Like others in the genus Diuris, it has two ear-like petals and is similar to the common donkey orchid of Western Australia with which it has been confused. This species is found in New South Wales, Victoria, South Australia and Tasmania and its stalk-like petal "claw" is shorter in than those of D. corymbosa.

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

Diuris conspicillata, commonly called the spectacled donkey orchid is a species of orchid which is endemic to the south-west of Western Australia. It is an uncommon species, only found on two coastal granite outcrops, growing in shallow soil pockets.

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

Diuris eborensis is a species of orchid which is endemic to eastern Australia. It has up to six grass-like leaves and a flowering stem with up to four pale yellowish flowers with dark reddish purple streaks.

Diuris amplissima, commonly called the giant donkey orchid is a species of orchid that is endemic to the south-west of Western Australia. It is a rare species and the largest Diuris in Western Australia. It has two or three leaves at its base and up to seven purple and dull yellowish-brown flowers on a tall flowering stem.

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

Diuris concinna, commonly called the elegant donkey orchid, is a species of orchid which is endemic to the south-west of Western Australia. It has up to five linear leaves at its base and up to five pale yellow flowers with brown markings. It is found along the south coast, often growing in areas that are flooded in winter and flowering more prolifically after fire the previous summer.

Diuris eburnea is a species of orchid that is endemic to the south-west of Western Australia. It has between four and six linear leaves and up to eight pale yellow to cream-coloured flowers with reddish markings. It is only known from near the Arrowsmith River north of Eneabba.

Diuris flavescens, commonly called the pale yellow doubletail or Wingham doubletail, is a species of orchid which is endemic to a small area in New South Wales. It has two linear leaves at its base and up to five pale yellow flowers with dark brown markings. Fewer than 200 plants survive in grassy forest near Wingham.

Diuris heberlei, commonly called Heberle's donkey orchid, is a species of orchid which is endemic to the south-west of Western Australia. It has three to five linear leaves at its base and up to four bright yellow flowers with a reddish brown border around the labellum callus. It is found along the south coast and is one of the last Diuris to flower in Western Australia.

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

Diuris laevis, commonly known as the nanny goat orchid, is a rare species of orchid that is endemic to the south-west of Western Australia. It has between four and eight leaves and up to six pale yellow flowers which usually have reddish-brown markings. It has an unusually short dorsal sepal and wide labellum and is relatively common between Bunbury and Albany.

Diuris micrantha, commonly called the dwarf bee orchid or tiny bee orchid, is a rare species of orchid which is endemic to the south-west of Western Australia. It has four to six linear leaves at its base and up to six yellow flowers with reddish brown markings. It grows in swampy places south of Perth.

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 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.

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.

Diuris secundiflora, commonly known as the one-sided donkey orchid, is a poorly-known species of orchid that is endemic to New South Wales. It has a single grass-like leaf and up to eight yellow flowers that are sometimes spotted and are all arranged on one side of the flowering stem.

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

Diuris setacea, commonly called the bristly donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has a tuft of up to ten twisted leaves at its base and up to seven yellow flowers with a few brown markings. It grows in moist soil on granite outcrops and flowers much more prolifically after fire the previous summer.

Diuris tricolor, commonly known as the long-tailed donkey orchid or pine donkey orchid, is a species of orchid that is endemic to New South Wales, although a single plant has been found in Victoria. It has up to three grass-like leaves and up to six orange-coloured to yellow flowers with white and purplish tints. The lateral sepals are unusually long.

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

Diuris jonesii, commonly known as Dunsborough donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It has large, yellow, brown and mauve flowers and is found in near-coastal areas between Dunsborough and Augusta.

References

  1. "Diuris purdiei". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. 1 2 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. pp. 136–137. ISBN   1877069124.
  3. 1 2 Brown, Andrew; Dixon, Kingsley; French, Christopher; Brockman, Garry (2013). Field guide to the orchids of Western Australia : the definitive guide to the native orchids of Western Australia. Simon Nevill Publications. p. 233. ISBN   9780980348149.
  4. Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 497. ISBN   9780646562322.
  5. 1 2 "Duiris purdiei". APNI. Retrieved 4 April 2018.
  6. Diels, Ludwig (1903). "Two new species of Orchideae from Western Australia". Journal and Proceedings of the Mueller Botanic Society of Western Australia. 1 (11): 79. Retrieved 4 April 2018.
  7. "Purdie, Alexander (1859 - 1905)". Australian National Botanic Garden. Retrieved 4 April 2018.
  8. 1 2 "Diuris purdiei". FloraBase . Western Australian Government Department of Parks and Wildlife.
  9. "Approved Conservation Advice for Diuris purdiei (Purdie's Donkey-orchid)" (PDF). Australian Government Department of the Environment. Retrieved 4 April 2018.