Wilsonia humilis is a species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of perennial subshrub

Subshrub

A subshrub or dwarf shrub is a short woody plant. Prostrate shrub is a similar term.It is distinguished from a shrub by its ground-hugging stems and lower height, with overwintering perennial woody growth typically less than 10–20 cm tall, or by being only weakly woody and/or persisting...

 in the family Convolvulaceae

Convolvulaceae

Convolvulaceae, known commonly as the bindweed or morning glory family, are a group of about 60 genera and more than 1,650 species of mostly herbaceous vines, but also trees, shrubs and herbs.- Description :...

. The species is endemic to Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

, occurring in coastal saltmarshes and also occasionally in inland saline areas, often colonising bare ground.

Description

Silky Wilsonia is a low-growing mat forming species, growing to 10 cm tall. The plant is covered with short, white hairs imparting a silvery appearance. The small, crowded leaves are concave and overlapping and are 1.5 to 4 mm long and 2 to 3 mm long.White flowers appear between September and December in the species native range. These are followed by capsular fruits which are 3 mm long.

Taxonomy

The species was first formally described in 1810 by botanist Robert Brown

Robert Brown (botanist)

Robert Brown was a Scottish botanist and palaeobotanist who made important contributions to botany largely through his pioneering use of the microscope...

 in Prodromus Florae Novae Hollandiae.

Distribution

The species is native to Western Australia

Western Australia

Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...

, South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

, Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

 and Tasmania

Tasmania

Tasmania is an Australian island and state. It is south of the continent, separated by Bass Strait. The state includes the island of Tasmania—the 26th largest island in the world—and the surrounding islands. The state has a population of 507,626 , of whom almost half reside in the greater Hobart...

. It has been recorded in 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...

, but the record is regarded as doubtful. In Tasmania, the species is rare, occurring near Pitwater, Dunalley

Dunalley, Tasmania

Dunalley is a small fishing village on the east coast of Tasmania, Australia. It is part of the Sorell Council. At the 2006 census, Dunalley had a population of 313.Nearby towns include Scottsdale and Sorell...

 and Cape Portland.