Diuris brevifolia

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Short-leaved donkey orchid
Diuris brevifolia - Flickr. 003.jpg
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. brevifolia
Binomial name
Diuris brevifolia

Diuris brevifolia, commonly known as the short-leaved donkey orchid, [2] is a species of orchid which is endemic to South Australia. It has a few narrow, twisted leaves and a flowering stem with up to five bright yellow flowers with brown markings and relatively large, spreading lobes on the labellum. This is a relatively late-flowering species of donkey orchid.

Contents

Description

Diuris brevifolia is a tuberous, perennial herb with between four and eight, often twisted leaves which are 70–120 mm (3–5 in) long and 3–4 mm (0.1–0.2 in) wide. Up to five bright yellow flowers 15–20 mm (0.6–0.8 in) wide are borne on a flowering stem 150–400 mm (6–20 in) tall. There are two brown spots on the base of the dorsal sepal and the labellum callus is outlined in brown. The dorsal sepal is erect or bent upwards, 12–15 mm (0.5–0.6 in) long, 6–7 mm (0.2–0.3 in) wide. The lateral sepals are greenish, linear to lance-shaped, 13–16 mm (0.5–0.6 in) long, 3–4 mm (0.1–0.2 in) wide and turn downwards, more or less parallel to each other. The petals are erect or curved backwards, have a dark brown stalk 4–6 mm (0.16–0.24 in) long with a blade 9–11 mm (0.35–0.43 in) long and 6–7 mm (0.2–0.3 in) wide. The labellum is egg-shaped, 12–15 mm (0.5–0.6 in) long and 7–8 mm (0.28–0.31 in) wide with side lobes 5–6 mm (0.20–0.24 in) long and about 3 mm (0.1 in) wide. There are two parallel ridge-like calli about 6–7 mm (0.2–0.3 in) long near the mid-line of the labellum. Flowering occurs from October to December. [2] [3]

Taxonomy and naming

Diuris brevifolia was first formally described in 1922 by Richard Sanders Rogers who published his description in Transactions and Proceedings of the Royal Society of South Australia. [1] [4] The specific epithet (brevifolia) is derived from the Latin words brevis meaning "short" [5] :708 and folia meaning "leaves". [5] :466

Distribution and habitat

The short-leaved donkey orchid grows in a variety of habitats including heath, forest and woodland but is most common around the edges of swamps and river flats. It only occurs to the south of Adelaide and on Kangaroo Island. [3]

Conservation

There has been a large decline in the distribution and abundance of this donkey orchid in recent years and is listed as "endangered" in South Australia. The main threats to the species are incompatible land use and infrequent fire. [3]

Related Research Articles

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

Diuris brumalis, commonly known as the winter donkey orchid, is a species of orchid that is endemic to the south-west of Western Australia. It is one of the first species of donkey orchid to flower in Western Australia each year and its flowers have been shown to attract the same insects that pollinate other species, but without offering a food reward.

<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 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 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.

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 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.

Diuris byronensis, commonly known as the Byron Bay donkey orchid, is a species of orchid which is endemic to the Arakwal National Park in New South Wales. It has one or two grass-like leaves and up to five bright yellow flowers with blackish markings. It has a very limited distribution near Byron Bay.

Diuris chrysantha, commonly known as granite donkey orchid, is a species of orchid that is endemic to eastern Australia. It has one or two leaves and up to seven deep golden to orange-coloured flowers with brown markings and occurs on the ranges and tablelands north from Tamworth to the Darling Downs.

<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 emarginata, commonly called the late donkey orchid, is a species of orchid which is endemic to the south-west of Western Australia. It has up to six leaves and a flowering stem with up to eight yellow flowers with brown markings but only after fires the previous summer.

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 parvipetala, commonly known as slender purple donkey orchid, is a species of orchid that is endemic to eastern Australia. It usually has two leaves at its base and up to nine relatively small, whitish to mauve flowers with purple markings. It is an uncommon species found in northern New South Wales and southern Queensland.

Diuris platichila, commonly known as the Blue Mountains doubletail, is a species of orchid that is endemic to a few isolated places in the Blue Mountains in New South Wales. It has two leaves and up to eight yellow flowers with dark markings on the dorsal sepal and labellum. It has relatively long, thin lateral sepals and the central lobe of the labellum is wedge-shaped. It forms hybrids with other species of Diuris.

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

Diuris purdiei, commonly known as Purdie's donkey orchid, 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.

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 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. 1 2 "Duiris brevifolia". APNI. Retrieved 6 March 2018.
  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. 125–126. ISBN   1877069124.
  3. 1 2 3 "Threatened species profile - Diuris brevifolia" (PDF). Government of South Australia Department for Environment and Heritage. Retrieved 6 March 2018.
  4. Rogers, Richard S. (1922). "Contributions to the Orchidology of Australia and New Zealand". Transactions and Proceedings of the Royal Society of South Australia. 46: 148–149. Retrieved 6 March 2018.
  5. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.