| Acacia undosa | |
|---|---|
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. undosa |
| Binomial name | |
| Acacia undosa | |
 | |
| Occurrence data from AVH | |
Acacia undosa is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
The dense spreading shrub typically grows to a height of 0.3 to 1.5 metres (1 to 5 ft) [1] and has a domed or obconic habit with hairy branchlets with persistent slender stipules that taper to a point and have a length of about 2 mm (0.079 in). Like most species of Acacia it has phyllodes rather than true leaves. The rigid, glabrous and pungent phyllodes have a linear to linear-oblanceolate shape and are straight to slightly curved with a length of 2 to 4.5 cm (0.79 to 1.77 in) and a width of 1 to 4 mm (0.039 to 0.157 in) and terminate with a rigid point. [2] It blooms from July to September and produces yellow flowers. [1] The simple inflorescences occur in pairs in the axils and have spherical flower-heads with a diameter of 3 to 3.5 mm (0.12 to 0.14 in) containing 18 to 20 golden coloured flowers. The pimply looking and crustaceous seed pods form that have a linear shape but are strongly undulate with a length of 1 to 4 cm (0.39 to 1.57 in) and a width of 2.5 mm (0.098 in) with a distinct pale marginal nerve. The dark brown seeds inside the pods have an elliptic-oblong to broadly oblong-elliptic shape with a length of 2.2 to 2.7 mm (0.087 to 0.106 in). [2]
The species was first formally described by the botanists Richard Sumner Cowan and Bruce Maslin in 1995 as a part of the work Acacia Miscellany. Five groups of microneurous species of Acacia (Leguminosae: Mimosoideae: section Plurinerves), mostly from Western Australia as published in the journal Nuytsia . It was reclassified as Racosperma undosum by Leslie Pedley in 2003 then transferred back to genus Acacia in 2006. [3]
It is native to an area in the Wheatbelt region of Western Australia where it is commonly situated in low-lying areas or on undulating plains growing in sandy clay or sandy-loamy soils. [1] The range of the plant extends from around Bruce Rock and Tammin in the north down to near Lake Grace in the south west and Lake King in the south east where it is often a part of open shrub mallee communities. [2]
Acacia repanda is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is endemic to a small area in western Australia.
Acacia yorkrakinensis is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is native to Western Australia.
Acacia scalena is a shrub of the genus Acacia and the subgenus Phyllodineae that is endemic to a small area in western Australia.
Acacia aulacophylla is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to western Australia.
Acacia cassicula is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
Acacia dissona is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
Acacia donaldsonii is a shrub of the genus Acacia and the subgenus Plurinerves that is endemism in an area of south western Australia.
Acacia graciliformis, also known as Koolanooka Delicate wattle, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in western Australia.
Acacia hadrophylla is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to south western Australia.
Acacia heteroclita is a shrub or tree of the genus Acacia and the subgenus Plurinerves that is endemic to south western Australia.
Acacia kenneallyi is a shrub or tree of the genus Acacia and the subgenus Plurinerves that is endemic to north western Australia.
Acacia multisiliqua is a shrub or tree of the genus Acacia and the subgenus Plurinerves that is endemic to northern Australia.
Acacia nyssophylla, commonly known as pin bush, wait a while and spine bush, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a large area of central and south-western and southern Australia.
Acacia pelophila is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area along the west coast of western Australia.
Acacia recurvata, commonly known as the recurved wattle, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area of western Australia.
Acacia tetanophylla is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
Acacia torticarpa is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in western Australia.
Acacia trulliformis is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
Acacia vittata, commonly known as Lake Logue wattle, is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a small area in western Australia.
Acacia warramaba is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to an area of south western Australia.
