| Acacia trineura | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Caesalpinioideae |
| Clade: | Mimosoid clade |
| Genus: | Acacia |
| Species: | A. trineura |
| Binomial name | |
| Acacia trineura | |
 | |
| Occurrence data from AVH | |
Acacia trineura, known colloquially as three-nerve wattle or three nerved wattle [1] or green wattle, [2] is a species of Acacia native to south eastern Australia. [1]
The shrub or small tree typically grows to a height of 1 to 5 m (3 ft 3 in to 16 ft 5 in) and has a rounded habit. The slightly angular and hoary branchlets have resinous ridges [3] and smooth grey bark. [1] Like most species of Acacia it has phyllodes rather than true leaves. The glabrous, thinly leathery and evergreen phyllodes have an obovate to oblanceolate shape with a length of 3 to 7 cm (1.2 to 2.8 in) and a width of 4 to 11 mm (0.16 to 0.43 in) and are straight to shallowly curved with three resinous and distinct main veins that are impressed in crests of low ridges and surrounded by many secondary veins. [3] It blooms between August and October. [1] The inflorescences occur in groups of three to eight on an axillary axis that is 2 to 15 mm (0.079 to 0.591 in) in length. the spherical flower-heads have a diameter of 3 to 5 mm (0.12 to 0.20 in) and contain 12 to 25 pale yellow to yellow coloured flowers. After flowering papery and sparsely haired seed pods form that are straight and more or less flat but raised over and constricted between each of the seeds. The pods are 3 to 8 cm (1.2 to 3.1 in) in length and 2 to 3 mm (0.079 to 0.118 in) wide. [1] The glossy black seeds inside are about 4 mm (0.16 in) in length and have an oblong shape. [3]
The species was first formally described by the botanist Ferdinand von Mueller in 1863 as a part of the work Fragmenta Phytographiae Australiae . It was reclassified by Leslie Pedley in 2003 as Racosperma trineurum then returned to genus Acacia in 2006. [2] The specific epithet is in reference to the three main veins visible in the phyllodes. [1] It is thought to be quite closely related to Acacia redolens , a species found in Western Australia. [4]
It is endemic to south eastern New South Wales, northern Victoria and south eastern South Australia. In New South Wales the range of the plant is mainly between West Wyalong, Condobolin and Forbes where it is usually found growing in red earth soils as a part of mallee communities. [1] In Victoria it is found in the Lowan Mallee, Murray Mallee and Wimmera regions where it found near water sources growing in red earth or clay soils. It is considered to be a vulnerable species in Victoria [3] It is considered to be rare in South Australia and is confined the south eastern part of the state to the south-west of Naracoorte growing in dark coloured but shallow cracking clays. [4]
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Acacia dentifera, commonly known as tooth-bearing acacia, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to south western Australia.
Acacia helmsiana, commonly known as Helm's wattle, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to arid areas of central and western Australia.
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Acacia microcarpa, commonly known as manna wattle, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae endemic to south eastern Australia.
Acacia doratoxylon, commonly known as currawang, lancewood, spearwood or coast myall, is a shrub or tree belonging to the genus Acacia and the subgenus Juliflorae that is native to eastern and south eastern Australia.
Acacia leptostachya, commonly known as Townsville wattle or slender wattle, is a shrub or small tree belonging to the genus Acacia and the subgenus Juliflorae that is native to north eastern Australia.
Acacia rhigiophylla, commonly known as dagger-leaf wattle, is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is native to southern Australia.
Acacia barattensis, commonly known as Baratta wattle, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in South Australia where the species is considered to be rare.
Acacia subporosa, also commonly known as river wattle, bower wattle, narrow-leaf bower wattle and sticky bower wattle, is a tree or shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south eastern Australia. It is considered to be rare in Victoria