Diuris eborensis

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Diuris eborensis
Diuris eborensis flower.jpg
Diuris eborensis growing near Ebor
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. eborensis
Binomial name
Diuris eborensis

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.

Contents

Diuris eborensis habit Diuris eborensis habit.jpg
Diuris eborensis habit

Description

Diuris eborensis is a tuberous, perennial herb with between three and six linear, grass-like leaves 70–300 mm (3–10 in) long, 3–6 mm (0.1–0.2 in) wide. Up to four flowers 18–23 mm (0.7–0.9 in) wide are borne on a flowering stem 150–350 mm (6–10 in) tall. The flowers are pale yellowish with dark reddish-purple streaks and striations and lean slightly forwards. The dorsal sepal is 8–12 mm (0.3–0.5 in) long, 6–9 mm (0.2–0.4 in) wide and directed upwards at an angle. The lateral sepals are 15–20 mm (0.6–0.8 in) long, 2.5–4 mm (0.1–0.2 in) wide, and turn slightly downwards. The petals are ear-like at the sides of the flower, 6–9 mm (0.2–0.4 in) long and 3–6 mm (0.1–0.2 in) wide on a purplish, stalk-like "claw" 5–6 mm (0.20–0.24 in) long. The labellum is 11–14 mm (0.4–0.6 in) long and has three lobes. The centre lobe is broad egg-shaped, 7–10 mm (0.3–0.4 in) long and 8–12 mm (0.3–0.5 in) wide and the side lobes are 3–5 mm (0.1–0.2 in) long and 2 mm (0.08 in) wide. The edges of the labellum are scalloped and there is a callus in its centre which has two short, broad ridges and a thin central ridge 5–8 mm (0.2–0.3 in) long. Flowering occurs from October to early December and the fruit which follows is a dehiscent capsule containing up to 500 seeds. [1] [2]

Taxonomy and naming

Diuris eborensis was first formally described in 2006 by David Jones and the description was published in Australian Orchid Research from a specimen collected near Rigney Creek, west of Ebor. [3]

Distribution and habitat

This donkey orchid grows in moist, grassy places near streams in five locations on the New England Tableland. [1] [4]

Conservation

Diuris eborensis is listed as "endangered" under the New South Wales Threatened Species Conservation Act 1995 and has been recommended for listing as "endangered" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 . The main threats to the species include grazing and trampling by cattle, competition from weeds, camping, roadworks and dumping of waste. [1] [2]

Related Research Articles

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

Diuris pardina, commonly known as the leopard orchid or leopard doubletail is a species of orchid which is endemic to south-eastern Australia. It has two or three grass-like leaves and up to ten yellow flowers with reddish-brown marks and blotches.

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

Diuris protena, commonly known as northern golden moths, is a species of orchid which is endemic to Victoria. It has a tuft of between four and eight leaves at the base and up to three mostly yellow flowers with a few light-coloured marks. It is classed as "endangered" in Victoria.

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

Diuris dendrobioides, commonly known as the wedge diuris, is a species of orchid which is endemic to eastern Australia. It has one or two leaves and a flowering stem with up to six pale lilac-coloured to mauve flowers with darker markings.

<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 exitela, commonly called the Mount Moffat doubletail, is a species of orchid which is endemic to central western Queensland. It has two linear leaves at its base, up to twelve bright yellow flowers with dark brown markings and grows on sandstone cliffs and ridges.

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 fragrantissima, commonly called the fragrant doubletail or Sunshine diuris, is a species of orchid which is endemic to a small area to the west of Melbourne. It has two linear leaves at its base and up to twelve white flowers with mauve or pale purple markings with unusually long lateral sepals. Only about thirty plants survive in grassland near Sunshine.

<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 luteola, commonly called the northern doubletail, is a species of orchid which is endemic to Queensland. It has a single linear leaf at its base and up to six pale yellow flowers with a few brown markings. It grows in shallow, stony soil on tablelands in eastern parts of the state.

Diuris ochroma, commonly known as pale goat orchid, or pale golden moths is a species of orchid that is endemic to south-eastern continental Australia. It has three or four leaves at its base and up to four slightly drooping pale yellow flowers with dark reddish purple streaks. It is an uncommon species found in two disjunct populations, in higher parts of each of New South Wales and Victoria.

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

Diuris pedunculata, commonly known as the small snake orchid, is a species of orchid which is endemic to New South Wales. It usually has two leaves at its base and one or two yellow and orange flowers with purple markings. It originally occurred in scattered populations between Tenterfield and the Hawkesbury River but because of habitat loss is now only known from the New England Tableland.

<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.

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 semilunulata</i> Species of orchid

Diuris semilunulata, commonly known as the late leopard orchid, is a species of orchid that is endemic to New South Wales and the Australian Capital Territory. It has two grass-like leaves and up to five orange-coloured flowers with brown and purple blotches.

Diuris striata is a poorly-known species of orchid that is endemic to New South Wales. It has a two grass-like leaves and about four mauve flowers with dark purple streaks on the labellum.

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.

References

  1. 1 2 3 Leishman, Michelle. "NSW Scientific Committee - Preliminary determination" (PDF). New South Wales Government Office of the Environment and Heritage. Retrieved 26 November 2017.
  2. 1 2 "Diuris eborensis - profile". NSW Government Office of. Retrieved 26 November 2017.
  3. "Duiris eborensis". APNI. Retrieved 26 November 2017.
  4. "Diuris eborensis". Royal Botanic Garden Sydney.