Acacia dunnii

Last updated

Elephant ear wattle
Acacia dunnii 4922376973 b2be63c106 o.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Clade: Mimosoid clade
Genus: Acacia
Species:
A. dunnii
Binomial name
Acacia dunnii
Acacia dunniiDistMap.png
Occurrence data from AVH
Synonyms [1]
  • Acacia sericata var. dunnii Maiden
  • Racosperma dunnii(Turrill) Pedley
Habit in Kings Park Elephant Ear Wattle in Kings Park.jpg
Habit in Kings Park

Acacia dunnii, commonly known as Dunn's wattle or elephant ear wattle [2] is a species of flowering plant in the family Fabaceae and is endemic to northern Australia. It is a shrub or tree covered with a fine, white powdery bloom, elliptic to egg-shaped phyllodes, spherical heads of golden yellow flowers and narrowly oblong, more or less woody pods. The Jamindjung, Ngaliwurru people and Nungali people know the plant as bawaya, and the Ngarinyman as barrawi. [3]

Contents

Description

Acacia dunnii is an erect shrub or small tree that typically grows to 1.5–6 m (4 ft 11 in – 19 ft 8 in) high, 2–4 m (6 ft 7 in – 13 ft 1 in) wide, [4] and is covered with a white, powdery bloom. The leaves are elliptic to egg-shaped, shallowly sickle-shaped, 120–420 mm (4.7–16.5 in) long and 60–175 mm (2.4–6.9 in) wide, wavy, leathery and glabrous with four or five prominent veins. The flowers are borne in spherical heads in panicles 110–500 mm (4.3–19.7 in) long on peduncles 8–20 mm (0.31–0.79 in) long, each head 6–8 mm (0.24–0.31 in) in diameter with 50 to 85 golden yellow flowers. Flowering occurs from January to June and the pods are narrowly oblong, more or less woody, up to 170 mm (6.7 in) long and 20–40 mm (0.79–1.57 in) wide. The seeds are broadly elliptic to oblong, 9–12 mm (0.35–0.47 in) long and brown with an aril on the end. [2] [3] [5] [6]

Taxonomy

Acacia dunnii was first formally described in 1922 by William Bertram Turrill in the Bulletin of Miscellaneous Information from "fissure in hard quartzite rock near Victoria River, Northern Territory" in 1922. [7] [8] The specific epithet (dunnii) honours Edward John Dunn, the Victorian government geologist. [9]

Turrill cited Acacia sericata var. dunnii as a synonym of A. dunnii. [7]

Distribution and habitat

Dunn's wattle grows in skeletal soils over sandstone, basalt or quartzite on ridges and stony hills in the Central Kimberley, Northern Kimberley, Ord Victoria Plain and Victoria Bonaparte bioregions of Western Australia and the Northern Territory. [3] [10] [11]

Conservation status

Acacia dunnii is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions [10] and as of "least concern" under the Northern Territory Government Northern Territory Parks and Wildlife Conservation Act . [3]

See also

References

  1. 1 2 "Acacia dunnii". Australian Plant Census. Retrieved 4 November 2025.
  2. 1 2 Cowan, Richard S.; Maslin, Bruce R. "Acacia dunnii". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 4 November 2025.
  3. 1 2 3 4 "NT Flora Northern Territory flora online factsheet: Acacia dunnii (Maiden) Turrill" . Retrieved 31 May 2018.
  4. "Elephant Ear Wattle Acacia dunnii" (PDF). Native plant notes. Kings Park and Botanic Gardens. Archived from the original (PDF) on 25 April 2018. Retrieved 21 August 2018.
  5. "Acacia dunnii". Australian Biological Resources Study. Retrieved 4 November 2025.
  6. "Acacia dunnii". World Wide Wattle. Retrieved 4 November 2025.
  7. 1 2 "Acacia dunnii". APNI. Retrieved 4 November 2025.
  8. Turrill, W.B. 1922. Dunn's Wattle. Bulletin of Miscellaneous Information, Royal Gardens, Kew (9) 298–299
  9. George, Alex S.; Sharr, Francis A. (2023). Western Australian Plant Names and Their Meanings - A Glossary (fifth ed.). Kardinya: Four Gables Press. p. 191. ISBN   9780645629538.
  10. 1 2 "Acacia dunnii". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  11. Moore, P. 2005. A guide to plants of Inland Australia, Reed New Holland, Sydney, Australia ISBN   9781876334864