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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 yirrkallensis

Acacia yirrkallensis Specht, 1958

Racosperma yirrkallense (Specht) Pedley

Native distribution areas:
Acacia yirrkallensis

Continental: Australasia
Regional: Australia
Northern Territory

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

Specht, R.L., 1958. Records of the American-Australian Scientific Expedition to Arnhem Land. 3. Botany and Plant Ecology. Melbourne 3:232, fig. 4.


Govaerts, R. et al. 2020. Acacia yirrkallensis in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Aug 19. Reference page.
International Plant Names Index. 2019. Acacia yirrkallensis. Published online. Accessed: Aug 19 2019. 2019. Acacia yirrkallensis. Missouri Botanical Garden. Published online. Accessed: 19 Aug 2019.
Catalogue of Life: 2021 Annual Checklist
Acacia yirrkallensis – Taxon details on World Wide Wattle.
USDA, ARS, Germplasm Resources Information Network. Acacia yirrkallensis in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Vernacular names

Acacia yirrkallensis is a shrub of the genus Acacia and the subgenus Plurinerves. It is native to the top end of the Northern Territory.[1]

1 Description
2 Habitat
3 Distribution
4 See also
5 References
6 External links


A. yirrkallensis is a resinous shrub to growing from 1 m to 2 m high. It can be erect or be lying flat on the ground and it branches near the ground. The bark is smooth, and a dark grey to dark brown. The smooth, brown/dark red-brown/yellowish branchlets are angular and have ridges which have minute resin crenulations. The straight to slightly curved, leathery phyllodes are very narrowly elliptic, and 1.5–4.5 cm by 1.4–5.2 mm, and have prominent stomata, with 1 or more prominent veins and indistinct parallel minor veins. Its globular yellow heads are 3–4.5 mm in diameter, with 10–13 flowers per head. The flowers are 5-merous and have a smooth, almost free calyx which is 0.9–1.1 mm long. The smooth corolla is 1.4–1.6 mm long. The woody, straight-sided, flat pods are oblanceolate, narrowing toward the base and 2–5 cm by 4–9 mm, and have oblique striations. Both the margins and the seed-partitions are prominent. The brown to dark brown seeds are 2.5–3.5 mm long. The stalk of the ovule expands to give a top-shaped aril.[4]

It flowers from June to January,[4] and fruits from February to October.[1]

It usually grows in eucalypt forest and woodland on grey sandy podsols, on laterite and bauxite on stony sandstone ridges and gorges.[4]

It is found in the Bioregions of Arnhem Coast, Arnhem Plateau, Central Arnhem, Gulf Fall and Uplands, Pine Creek, and Tiwi Cobourg.[1]
See also

List of Acacia species


"Acacia yirrkallensis NT Flora". Retrieved 26 January 2020.
"Acacia yirrkallensis". Australian Plant Name Index, IBIS database. Centre for Plant Biodiversity Research, Australian Government.
Specht, R.L. in Specht, R.L. & Mountford, C.P. (ed.) (1958) The Gymnospermae and Angiospermae collected on the Arnhem Land Expedition. Records of the American-Australian Scientific Expedition to Arnhem Land No. 3 Botany and Plant Ecology: 185, 232-233, fig. 4
Tindale, M.D.; Kodela, P.G. (2020). "Acacia yirrkallensis Specht". Flora of Australia. Australian Biological Resources Study, Department of the Environment and Energy, Canberra. Retrieved 27 January 2020.

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