Callistemon linearis is a shrub

Shrub

A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...

 in the family Myrtaceae

Myrtaceae

The Myrtaceae or Myrtle family are a family of dicotyledon plants, placed within the order Myrtales. Myrtle, clove, guava, feijoa, allspice, and eucalyptus belong here. All species are woody, with essential oils, and flower parts in multiples of four or five...

. It is native to the states of 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...

 and Queensland

Queensland

Queensland is a state of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean...

 in 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...

.

It grows up to around 3 metres in height and has a stiff appearance. The leaves

Leaf

A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....

 are 40 to 100 mm long and 1 to 3 mm wide. These are channeled or flat. Pale red flower spikes with darker anthers are produced from late spring to early summer

The species was first formally described by botanists Heinrich Adolf Schrader & Johann Christoph Wendland

Johann Christoph Wendland

Johann Christoph Wendland was a German botanist and gardener who was a native of Petit-Landau, Alsace. His son- Heinrich Ludolph Wendland and his grandson- Hermann Wendland were also gardeners and botanists.As a young man he received an education in horticulture at the nursery of Karlsruhe Palace...

 in 1796 in Sertum Hannoveranum, and given the name Melaleuca linearis. The species was transferred to the genus Callistemon in 1826 by botanist Robert Sweet

Robert Sweet (botanist)

Robert Sweet was an English botanist, horticulturist and ornithologist.Born at Cockington near Torquay, Devonshire, England in 1783, Sweet worked as a gardener from the age of sixteen, and became foreman or partner in a series of nurseries. He was associated with nurseries at Stockwell, Fulham...

 in Sweet's Hortus Britannicus and given the name Callistemon lineare (later amended to linearis).