Acacia diallaga

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Acacia diallaga
Status DECF P1.svg
Priority One — Poorly Known Taxa (DEC)
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. diallaga
Binomial name
Acacia diallaga

Acacia diallaga is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is a dense, spreading, much branched shrub with narrowly elliptic to oblong or lance-shaped phyllodes, spikes of light golden yellow flowers and narrowly oblong, thinly leathery pods.

Contents

Description

Acacia diallaga is a dense, spreading, much-branched shrub that typically grows to a height of 0.5–1.5 m (1 ft 8 in – 4 ft 11 in) but can reach as high as 3 m (9.8 ft) and has glabrous branchlets. Its phyllodes are narrowly elliptic to oblong or lance-shaped and slightly asymmetric, straight or slightly down-turned, mostly 15–36 mm (0.59–1.42 in) long and 5–6 mm (0.20–0.24 in) with a sharp point on the end. The phyllodes are rigid, glabrous and glaucous, green or reddish-purple. The flowers are light golden yellow and borne in spikes 5–10 mm (0.20–0.39 in) long on a peduncle 2–4 mm (0.079–0.157 in) long with a bract at the base. Flowering time is difficult to determine but possibly responds opportunistically to rainfall. The pods are narrowly oblong, not or slightly constricted between the seeds, 25–55 mm (0.98–2.17 in) long and 4.0–4.5 mm (0.16–0.18 in) wide, thinly leathery, glabrous and light brown. The seeds are oblong, 3–4 mm (0.12–0.16 in) long and black with a creamy white aril. [2] [3] [4]

Taxonomy

Acacia diallaga was first formally described in 2008 by Bruce Maslin and Carrie Buscumb in the journal Nuytsia from specimens collected on Karara Station in September 2007. [2] [5] The specific epithet (diallaga) means 'interchange', referring to the change in colour of the plant's phyllodes, from more or less glaucous to purplish-red, when water becomes limiting during periods of drought. [2]

Distribution and habitat

This species of wattle is native to an area near Karara and Warriedar Stations to the east of Morawa where it grows on slopes or the crests of low rocky hills growing in skeletal soils in Allocasuarina or Acacia shrubland communities, [2] in the Yalgoo bioregion of Western Australia. [6]

Conservation status

Acacia diallaga is listed as "Priority One" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, [6] meaning that it is known from only one or a few locations where it is potentially at risk. [7]

See also

References

  1. ↑ "Acacia diallaga". Australian Plant Census. Retrieved 26 September 2025.
  2. 1 2 3 4 Maslin, Bruce R.; Buscomb, Carrie (2008). "Acacia diallaga (Leguminosae: Mimosoideae), a new geographically restricted species with diallagous phyllodes from the Midwest Region of south-west Western Australia". Nuytsia. 18: 128–131. Retrieved 26 September 2025.
  3. ↑ Reid; Maslin, Bruce R. Kodela, Phillip G. (ed.). "Acacia diallaga". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 26 September 2025.
  4. ↑ "Acacia diallaga Maslin & Buscumb". Wattles - Acacias of Australia. Lucid Central. Retrieved 2 April 2020.
  5. ↑ "Acacia diallaga". APNI. Retrieved 26 September 2025.
  6. 1 2 "Acacia diallaga". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  7. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 26 September 2025.
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