Nature conservation

Threatened species

Buttercup Doubletail - profile

Indicative distribution

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The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Diuris aequalis
Conservation status in NSW: Endangered
Commonwealth status: Vulnerable
Gazetted date: 01 Nov 2002
Profile last updated: 11 Feb 2019


The buttercup doubletail is a terrestrial ‘donkey’ orchid with chrome yellow flowers. It differs from many other Diuris species by the absence of markings (dots or stripes) on the flowers. The two petals above the centre of the flower are widely spaced resembling donkeys' ears. The green lateral sepals (below the centre of the flower) form two long and narrow tails which often curve over each other (from which its name "doubletail' is derived). Flowering occurs between mid-October and mid-November in the southern part of its range, and between mid-November and early December in the populations north of the Abercrombie River.

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The buttercup doubletail has been recorded in Kanangra-Boyd National Park, Gurnang State Forest, towards Wombeyan Caves, the Taralga - Goulburn area, and the ranges between Braidwood, Tarago and Bungendore. The type location (from the 19th Century) is Liverpool, west of Sydney. However, this and other questionable records from the Sydney metropolitan area are unlikely based on current knowledge of the species.

Habitat and ecology

  • Recorded in forest, low open woodland with grassy understorey and secondary grassland on the higher parts of the Southern and Central Tablelands (especially on the Great Dividing Range).
  • Leaves die back each year and resprout just before flowering.
  • Populations tend to contain few, scattered individuals; despite extensive surveys, only about 2000 plants in total, from 20 populations are known.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
South Eastern HighlandsBungonia Known None
South Eastern HighlandsCrookwell Known Within 20 km of the Great Dividing Range
South Eastern HighlandsKanangra Known None
South Eastern HighlandsMonaro Known North of Hoskintown
South Eastern HighlandsOberon Known None