Acacia rivalis

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.

Silver wattle
Illustration from the Transactions and proceedings and report of the Philosophical Society of Adelaide in 1918
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Clade: Mimosoideae
Genus: Acacia
Species:
A. rivalis
Binomial name
Acacia rivalis
Occurrence data from AVH

Description

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]

Distribution

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

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