| Hamilton's wattle | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Clade: | Mimosoideae |
| Genus: | Acacia |
| Species: | A. hamiltoniana |
| Binomial name | |
| Acacia hamiltoniana | |
 | |
| Occurrence data from AVH | |
Acacia hamiltoniana, commonly known as Hamilton's wattle, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is native to parts of eastern Australia.
The shrub typically grows to a height of up to 3 m (9.8 ft) and has a bushy habit with glabrous, finely ribbed, dark red branchlets. It has smooth, green phyllodes that are mostly ascending to erect. The variable phyllodes have a linear to linear-oblanceolate or narrowly elliptic shape with a length of 3 to 8 cm (1.2 to 3.1 in) and a width of 2 to 5 mm (0.079 to 0.197 in) and are narrowed at the base. It usually blooms between August and September [1] producing inflorescences with spherical flower-heads containing 9 to 15 subdensely packed golden flowers. The seed pods that form after flowering are black with a length of up to 5.5 cm (2.2 in) and a width of 1 cm (0.39 in). the pods contain shiny black seeds with an oblong to elliptic to ovate shape and a length of 4 to 5 mm (0.16 to 0.20 in). [2]
The species was first formally described by the botanist Joseph Maiden in 1920 as part of the work Notes on Acacias with descriptions of new species as published in the Journal and Proceedings of the Royal Society of New South Wales. It was reclassified in 2003 as Racosperma hamiltonianum by Leslie Pedley then transferred back to genus Acacia in 2006. [3] The specific epithet honours Arthur Andrew Hamilton, who collected the type specimen from around Leura in 1907. [1]
The shrub has a distribution in the Great Dividing Range and the associated foothills in western New South Wales from around Rylstone in the north down to around the Clyde River in the south where it is growing in sandy or loamy soils as a part of heath and Eucalyptus woodland communities. [2] It is often found on and around sandstone outcrops as a part of dry sclerophyll forest and heathland communities. [1]
Acacia fimbriata, commonly known as the fringed wattle or Brisbane golden wattle, is a species of Acacia that is native along much of the east coast of Australia.
Acacia caesiella, commonly known as tableland wattle, bluebush wattle or blue bush, is a shrub or small tree that is endemic to eastern Australia.
Acacia jibberdingensis, also known as Jibberding wattle or willow-leafed wattle, is a shrub or tree belonging to the genus Acacia and the subgenus Juliflorae that is endemic to Western Australia.
Acacia levata is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is endemic to small arid area of western Australia.
Acacia merrickiae is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to a small area of south western Australia.
Acacia nigripilosa is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to Western Australia.
Acacia obtecta is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in south western Australia.
Acacia alleniana is a shrub or tree belonging to the genus Acacia and the subgenus Phyllodineae endemic to northern parts of Australia.
Acacia gillii, commonly known as Gill's wattle, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is native to parts of southern Australia.
Acacia gracilifolia, commonly known as graceful wattle, is a shrub belonging to the genus Acacia and the subgenus Plurinerves native to a small area of central southern Australia.
Acacia ruppii, commonly known as Rupp's wattle, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae native to eastern Australia. It is listed as endangered in the Environment Protection and Biodiversity Conservation Act 1999.
Acacia kettlewelliae, commonly known as buffalo wattle, is a tree or shrub of the genus Acacia and the subgenus Phyllodineae that is endemic to south eastern Australia.
Acacia kybeanensis, commonly known as kybean wattle or kybeyan wattle, is a shrub of the genus Acacia and the subgenus Phyllodineae that is endemic to south eastern Australia.
Acacia kydrensis, commonly known as Kydra wattle, is a shrub of the genus Acacia and the subgenus Phyllodineae that is endemic to south eastern Australia.
Acacia linearifolia, commonly known as stringybark wattle or narrow-leaved wattle, is a shrub or tree of the genus Acacia and the subgenus Phyllodineae that is endemic to eastern Australia.
Acacia mabellae, commonly known as Mabels's wattle or black wattle, is a shrub or tree of the genus Acacia and the subgenus Phyllodineae that is endemic to eastern Australia.
Acacia curranii, also known as curly-bark wattle, is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is native to north eastern Australia. It is listed as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999.
Acacia williamsiana is a tree or shrub belonging to the genus Acacia and the subgenus Juliflorae that is native to eastern Australia.
Acacia pycnostachya, also known as Bolivia wattle, is a shrub or tree belonging to the genus Acacia and the subgenus Juliflorae that is native to eastern Australia.
Acacia baeuerlenii is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in eastern Australia.