Biology:Diuris magnifica
| Large pansy orchid | |
|---|---|
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| Diuris magnifica growing in Kings Park | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Tribe: | Diurideae |
| Genus: | Diuris |
| Species: | D. magnifica
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| Binomial name | |
| Diuris magnifica | |
Diuris magnifica, commonly called the large pansy orchid[2] is a species of orchid which is endemic to the south-west of Western Australia. It has large, colourful flowers and is common in a narrow range near the coast around Perth, often occurring with the similar but smaller Diuris corymbosa.
Description
Diuris magnifica is a tuberous, perennial herb, usually growing to a height of 300–600 mm (10–20 in). Two or three leaves emerge at the base, each leaf 120–220 mm (5–9 in) long, 18–24 mm (0.7–0.9 in) wide and folded lengthwise. There are between three and nine golden-yellow and purple flowers 40–60 mm (1.6–2.4 in) long and 30–50 mm (1–2 in) wide. The dorsal sepal is egg-shaped, 12–17 mm (0.5–0.7 in) long and 10–16 mm (0.4–0.6 in) wide and curves upwards. The lateral sepals are linear to lance-shaped, 16–26 mm (0.6–1 in) long, about 3 mm (0.1 in) wide, turned downwards and usually crossed. The petals are erect with an egg-shaped blade 20–30 mm (0.8–1 in) long and 12–14 mm (0.5–0.6 in) wide on a purplish-brown stalk 4–6 mm (0.16–0.24 in) long. The labellum is mauve or purple with some yellow markings, 13–18 mm (0.5–0.7 in) long and has three lobes. The centre lobe is wedge-shaped, 8–14 mm (0.3–0.6 in) long and 9–15 mm (0.4–0.6 in) wide and the side lobes are 10–16 mm (0.4–0.6 in) long and 5–8 mm (0.2–0.3 in) wide. There is a single yellow, ridged callus 2–3 mm (0.08–0.1 in) long in the mid-line of the labellum. The species is similar to several other Diuris including D. corymbosa and D. amplissima but is distinguished from them by its size, flowering period and distribution. Flowering occurs from late August to October.[2][3][4][5]
Taxonomy and naming
Diuris magnifica was first formally described in 1991 by David Jones from a specimen collected in a reserve near Kwinana and the description was published in Australian Orchid Review.[6][3] The specific epithet (magnifica) is a Latin word meaning "noble", "eminent" or "splendid"[7] referring to the large, colourful flowers of this orchid.[3]
Distribution and habitat
The large pansy orchid is common in near coastal shrubland and woodland between Lancelin and Mandurah in the Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain biogeographic regions. At the northern end of its distribution, this species hybridises with the as yet undescribed Arrowsmith pansy orchid (Diuris sp. 'Eneabba') and in the south with D. corymbosa.[4][5][8]
Conservation
Diuris magnifica is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[8]
References
- ↑ "Diuris magnifica". Australian Plant Census. https://biodiversity.org.au/nsl/services/apc-format/display/117444.
- ↑ 2.0 2.1 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. pp. 119–120. ISBN 1877069124.
- ↑ 3.0 3.1 3.2 Jones, David L. (1991). "New taxa of Australian Orchidaceae". Australian Orchid Research 2: 135.
- ↑ 4.0 4.1 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. 208. ISBN 9780980348149.
- ↑ 5.0 5.1 Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia. (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 471. ISBN 9780646562322.
- ↑ "Duiris magnifica". APNI. https://id.biodiversity.org.au/instance/apni/551658. Retrieved 9 March 2018.
- ↑ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 504.
- ↑ 8.0 8.1 "Diuris magnifica". FloraBase. Western Australian Government Department of Parks and Wildlife. https://florabase.dpaw.wa.gov.au/browse/profile/12939.
Wikidata ☰ Q3032192 entry
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