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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Acacieae
Genus: Acacia
Species: Acacia rivalis

Acacia rivalis J.M.Black, 1918

Racosperma rivale (J.M.Black) Pedley

Native distribution areas:
Acacia rivalis

Continental: Australasia
Regional: Australia
South Australia

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
Primary references

Black, J.M., 1918. Transactions and Proceedings of the Royal Society of South Australia. Adelaide, S.A. 42:173.


Govaerts, R. et al. 2020. Acacia rivalis in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 13. Reference page.
International Plant Names Index. 2019. Acacia rivalis. Published online. Accessed: Aug 13 2019. 2019. Acacia rivalis. Missouri Botanical Garden. Published online. Accessed: 13 Aug 2019.
Catalogue of Life: 2021 Annual Checklist
Acacia rivalis – Taxon details on World Wide Wattle.
USDA, ARS, Germplasm Resources Information Network. Acacia rivalis in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names
English: Creek Wattle, Silver Wattle

Acacia rivalis, commonly known as silver wattle or creek wattle, is a shrub or tree belonging to the genus Acacia and the subgenus Phyllodineae native to southern Australia.


The obconic shrub or tree typically grows to a height of 3 to 5 metres (9.8 to 16.4 ft) and has a bushy domed crown.[1] The green linear lanceolate shaped phyllodes have a length of up to 14 cm (5.5 in) and a width of 5 mm (0.20 in). The glabrous and shiny phyllodes are narrowed towards the base and have a prominent central vein. It blooms between May and November producing yellow flowers. The simple axillary inflorescences are solitary and have small spherical yellow flower-heads.[2] The smooth, brown and linear shaped seed pods that form after flowering can be straight or curved and have a length of up to 12 cm (4.7 in) and a width of 5 mm (0.20 in). The hard, black seeds found within the pods have an ellipsoidal shape with a length of 7 mm (0.28 in) and a width of 4 mm (0.16 in).[2]

It is endemic to some small areas on the Flinders Range in South Australia near Hawker in the south to around Mount Harris in the north and also around Wilgena much further to the west where it is found on ridges, stony slopes and along watercourses growing in shallow calcareous loamy soils as a part of tall open scrubland communities[1]
See also

List of Acacia species


"Acacia rivalis". World Wide Wattle. Western Australian Herbarium. Retrieved 2 June 2019.
"Acacia rivalis (Leguminosae) Creek Wattle". Seeds of South Australia. Government of South Australia. Retrieved 2 June 2019.

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