Acacia longifolia

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Acacia longifolia
Foliage and blossoms of Acacia longifolia
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fabales
Family: Fabaceae
Genus: Acacia
Species: A. longifolia
Binomial name
Acacia longifolia
(Andr.) Willd.
Range of Acacia longifolia
  • Acacia longifolia (Andrews) Willd. var. typica Benth.
  • Mimosa longifolia Andrews
  • Mimosa macrostachya Poir.
  • Phyllodoce longifolia (Andrews) Link
  • Racosperma longifolium (Andrews) C. Mart.[1]

Acacia longifolia is a species of Acacia native to southeastern Australia, from the extreme southeast of Queensland, eastern New South Wales, eastern and southern Victoria, and southeastern South Australia. Common names for it include Long-leaved wattle, Acacia Trinervis, Aroma Doble, Golden Wattle, Coast Wattle, Sallow Wattle and Sydney Golden Wattle. It is not listed as being a threatened species,[2][3] and is considered invasive in Portugal and South Africa.[4] It is a tree that grows very quickly reaching 7–10 m in five to six years.[5]


There are two subspecies:[2]


Acacia longifolia is widely cultivated in subtropical regions of the world. Its uses include prevention of soil erosion, food (flowers, seeds and seed pods), yellow dye (from the flowers), green dye (pods) and wood.[6] The flower colour derives from the organic compound kaempferol.[7] The tree's bark has limited use in tanning, primarily for sheepskin. It is useful for securing uninhabited sand in coastal areas, primarily where there are not too many hard frosts.[8]


In South Africa at least, the Pteromalid wasp Trichilogaster acaciaelongifoliae has been introduced from Australia, and has spread rapidly, achieving substantial control.[9] The effect on the trees has been described as drastic seed reduction (typically over 90%) by galling of reproductive buds, and indirect debilitation of the affected plant by increased abscission of inflorescences adjacent to the growing galls. The presence of galls also caused leaf abscission, reducing vegetative growth as well as reproductive output.

File:Galls of Trichilogaster acaciaelongifoliae (Froggatt) 9798.jpg
Young galls of Trichilogaster acaciaelongifoliae, still showing the branch morphology of the galled buds. One of the phyllodes already seems to be showing stress and might be expected to drop within a few weeks or months.
File:Galls on Acacia longifolia.jpg
Similar galls, probably on Acacia pycnantha, further advanced in development, and practically spherical

The leaves of the Coastal Wattle when crushed and mixed with water can be used as hand soap or to help soothe eczema




  1. "Acacia longifolia - ILDIS LegumeWeb". Retrieved 2008-05-18. 
  2. 2.0 2.1 Australian Plant Name Index: Acacia longifolia
  3. What goes here?
  4. Vespa australiana pode ajudar a reduzir invasão das acácias
  5. Warringah Online
  6. Plants for a Future: Acacia longifolia
  7. Lycaeum: Phytochemistry Intro
  8. Ferdinand Mueller (freiherr von) (1884). Select extra-tropical plants readily eligible for industrial culture or naturalization. G.S. Davis. pp. 7–. Retrieved 28 October 2010. 
  9. Dennill, G.B. ; The effect of the gall wasp Trichilogaster acaciaelongifoliae (Hymenoptera: Pteromalidae) on reproductive potential and vegetative growth of the weed Acacia longifolia; Agriculture, Ecosystems & Environment, Volume 14, Issues 1-2, November 1985, Pages 53-61
  10. 10.0 10.1 Repke DB (1975). "The histamine amides of Acacia longifolia". Lloydia 38 (2): 101–5. PMID 1134208. 
  11. Hegnauer, Robert (1994). Chemotaxonomie der Pflanzen. Springer. ISBN 3-7643-2979-3., Nen in Entheogen Review (journal) 1994-7
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