Dillwynia tenuifolia is a rare plant endemic

Endemic (ecology)

Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, all species of lemur are endemic to the...

 to New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

. It is a member of the tribe Mirbelieae

Mirbelieae

Mirbelieae, commonly known as the bush, golden or egg-and-bacon peas are a legume tribe endemic to Australia. Phylogenetic analysis suggests that Mirbelieae is paraphyletic with respect to Bossiaeeae....

 which are known for their golden pea-shaped flowers.

D. tenuifolia is a small shrub, to 1 metre, it produces orange-yellow and red pea-flowers

It is found around Sydney

Sydney

Sydney is the most populous city in Australia and the state capital of New South Wales. Sydney is located on Australia's south-east coast of the Tasman Sea. As of June 2010, the greater metropolitan area had an approximate population of 4.6 million people...

, on the Cumberland Plain

Cumberland Plain

The Cumberland Plain is a region in the Sydney Basin of New South Wales, Australia. The plain extends from 10 kilometres north of Windsor in the north, to Picton in the south; and...

 from Windsor

Windsor, New South Wales

Windsor is a town in the state of New South Wales, Australia. Windsor is located in the local government area of the City of Hawkesbury. It sits on the Hawkesbury River, on the north-western outskirts of the Sydney metropolitan area. At the 2006 census, Windsor had a population of...

 to Penrith

Penrith, New South Wales

Penrith is a suburb in western Sydney, in the state of New South Wales, Australia. Penrith is located west of the Sydney central business district and is the administrative centre for the local government area of the City of Penrith...

 east to Deans Park. Other populations in western Sydney are recorded from Voyager Point

Voyager Point, New South Wales

Voyager Point is a small suburb, in South-western Sydney, in the state of New South Wales, Australia. Voyager Point is located 27 kilometres south-west of the Sydney central business district, in the local government area of the City Of Liverpool. The only adjacent suburbs are Hammondville,...

 and Kemps Creek

Kemps Creek, New South Wales

Kemps Creek is a suburb of Sydney, in the state of New South Wales, Australia. Kemps Creek is located 39 kilometres west of the Sydney central business district, in the local government areas of the City of Penrith and City of Liverpool...

, Ludenham

Luddenham, New South Wales

Luddenham is a suburb of Sydney, in the state of New South Wales, Australia. Luddenham is located 42 kilometres west of the Sydney central business district, in the local government areas of the City of Penrith and City of Liverpool...

, South Maroota

South Maroota, New South Wales

South Maroota is a suburb in Sydney, New South Wales, Australia. South Maroota is located 72 kilometres north-west of the Sydney central business district in the local government area of The Hills Shire.-Recreation:...

. Other populations are known from the Bulga Mountains, Kurrajong Heights and Woodford

Woodford, New South Wales

Woodford is a village in the Blue Mountains in New South Wales, Australia, approximately 90 kilometres west of Sydney. Its elevation is above sea level. It is situated on the Great Western Highway and has a railway station on the Main Western railway line served by CityRail's Blue Mountains...

 in the Lower Blue Mountains.

It is classified as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999

Environment Protection and Biodiversity Conservation Act 1999

The Environment Protection and Biodiversity Conservation Act 1999 is an Act of the Parliament of Australia that provides a framework for protection of the Australian environment, including its biodiversity and its natural and culturally significant places...

, however international agencies like the IUCN do not consider it threatened. Its distribution has been modified by urban development which has required land clearing and has fragmented habitats, changes to fire regimes have also effected the species.