Acacia dempsteri

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Acacia dempsteri
Acacia dempsteri.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. dempsteri
Binomial name
Acacia dempsteri
Acacia dempsteriDistMap273.png
Occurrence data from AVH
Synonyms [1]

Racosperma dempsteri(F.Muell.) Pedley

Habit Acacia dempsteri habit.jpg
Habit

Acacia dempsteri is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a straggly, prickly shrub or tree with lance-shaped to narrowly lance-shaped phyllodes, large spherical heads of golden yellow flowers and narrowly oblong , firmly papery pods.

Contents

Description

Acacia dempsteri is a straggly, prickly shrub that typically grows to a height of 1.2 to 4 metres (4 to 13 ft) and has glabrous branchlets covered with a whitish, powdery bloom. The phyllodes are lance-shaped to narrowly lance-shaped, straight to slightly curved or slightly s-shaped, 30–60 mm (1.2–2.4 in) long and 4–10 mm (0.16–0.39 in) wide and thinly leathery with a prominent midrib. There are spiny stipules 5–12 mm (0.20–0.47 in) long at the base of the phyllodes. The flowers are borne in one or two spherical heads in axils on a peduncle 15–25 mm (0.59–0.98 in) long, each head about 10 mm (0.39 in) in diameter with 40 to 50 golden yellow flowers. Flowering occurs in September and October, and the pods are narrowly oblong, firmly papery, up to 50 mm (2.0 in) long, 8–11 mm (0.31–0.43 in) wide, dark brown and glabrous. The seeds are oblong, 3–4 mm (0.12–0.16 in) long and mostly dark brown with a folded aril. [2] [3] [4] [5]

Taxonomy

Acacia dempsteri was first formally described in 1879 by the botanist Ferdinand von Mueller in his Fragmenta Phytographiae Australiae from specimens collected by Andrew Dempster. [6] [7] The specific epithet (dempsteri) honours the collector of the type specimens. [8]

Distribution

This species of wattle has a scattered distribution from near Kambalda south to Gilmore Rocks (about 50 km (31 mi)) north of Salmon Gums where it is found amongst granite outcrops growing in skeletal sandy or loamy soils in shrubland or mallee in the Coolgardie and Mallee bioregions in the south-west of Western Australia. [2] [3] [5]

See also

References

  1. 1 2 "Acacia dempsteri". Australian Plant Census. Retrieved 6 September 2025.
  2. 1 2 Maslin, Bruce R. Kodela, Phillip G. (ed.). "Acacia dempsteri". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 6 September 2025.
  3. 1 2 "Acacia dempsteri". World Wide Wattle. Western Australian Herbarium . Retrieved 28 June 2019.
  4. ↑ "Acacia dempsteri". Australian Biological Resources Study. Retrieved 6 September 2025.
  5. 1 2 "Acacia dempsteri". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. ↑ "Acacia dempsteri". APNI. Retrieved 6 September 2025.
  7. ↑ von Mueller, Ferdinand (1879). Fragmenta Phytographiae Australiae. Melbourne: Victorian Government Printer. p. 65. Retrieved 6 September 2025.
  8. ↑ George, Alex S.; Sharr, Francis A. (2023). Western Australian Plant Names and Their Meanings - A Glossary (fifth ed.). Kardinya: Four Gables Press. p. 182. ISBN   9780645629538.
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