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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 semirigida
Name

Acacia semirigida Maiden & Blakely, 1927
Synonyms

Racosperma semirigidum (Maiden & Blakely) Pedley

Distribution
Native distribution areas:
Acacia semirigida

Continental: Australasia
Regional: Australia
Queensland

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

Maiden, J.H. & Blakely, W.F., 1927. Proceedings of the Royal Society of Queensland 38:116.

Links

Govaerts, R. et al. 2020. Acacia semirigida in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Aug 14. Reference page.
International Plant Names Index. 2019. Acacia semirigida. Published online. Accessed: Aug 14 2019.
Tropicos.org 2019. Acacia semirigida. Missouri Botanical Garden. Published on the internet. Accessed: 2019 Aug 14.
Catalogue of Life: 2020 Annual Checklist
Acacia semirigida – Taxon details on World Wide Wattle.
USDA, ARS, Germplasm Resources Information Network. Acacia semirigida in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names
English: Stony Ridge Wattle

Acacia semirigida, also known as stony ridge wattle,[2] is a shrub or tree belonging to the genus Acacia and the subgenus Phyllodineae native to north eastern Australia.

Description

The shrub or tree typically grows to a height of 4 metres (13.1 ft). It has glabrous, dark reddish branchlets that are angled at the extremities. Like most species of Acacia it has phyllodes rather than true leaves, the phyllodes are usually ascending to erect and have a narrowly oblanceolate to narrowly elliptic or linear shape that is straight or shallowly incurved. The thin, glabrous and moderately coriaceous phyllodes are 4 to 8 cm (1.6 to 3.1 in) in length and 4 to 8 mm (0.16 to 0.31 in) wide have a distinct midrib and marginal nerves. When it blooms it produces racemose inflorescences with small spherical flower-heads that contain 15 to 25 pale yellow flowers. After flowering thinly coriaceous seed pods that are dark or reddish brown in colour. The pods have straight edges but can be slightly constricted between the seeds. They are to around 12 cm (4.7 in) in lengtha dn 8 to 10 mm (0.31 to 0.39 in) wide and slightly shiny. The seeds inside the pods are arranged longitudinally and have a narrowly oblong to slightly elliptic shape. The slightly shiny black seeds have a length of 7 to 8 mm (0.28 to 0.31 in) and are minutely pitted with a clavate aril.[2]
Distribution

It is endemic are an area over which it is found scattered in south eastern Queensland from around Goombungee and Kogan in the north to near Eidsvold in the south where it is found growing in shallow soils over and around sandstone as a part of open Eucalyptus forest communities.[2][3]
See also

List of Acacia species

References

"DOI Details". doi.ala.org.au. doi:10.26197/5c0b1388984eb. Retrieved 8 December 2018.
"Acacia semirigida". World Wide Wattle. Western Australian Herbarium. Retrieved 6 June 2019.
"Acacia semirigida Maiden & Blakely". Wattle - Acacias of Australia. Lucid Central. Retrieved 3 September 2019.

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