Acacia adoxa

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Grey whorled wattle
Acacia adoxa.jpg
In Karijini National Park
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. adoxa
Binomial name
Acacia adoxa
Acacia adoxaDistMap19.png
Occurrence data from AVH
Synonyms [1]

Racosperma adoxum(Pedley) Pedley

Habit of var. adoxa near Newman Acacia adoxa habit.jpg
Habit of var. adoxa near Newman

Acacia adoxa, commonly known as the grey-whorled wattle, [2] is a species of flowering plant in the family Fabaceae and is endemic to north-western Australia. It is a dense, low-lying shrub with linear, more or less cylindrical phyllodes in whorls of 6 to 10, heads of golden-yellow flowers, and flat, sticky pods.

Contents

Description

Acacia adoxa is a dense, low-lying shrub that typically grows to a height of up to 50 cm (20 in) and about 1 m (3 ft 3 in) in diameter, sometimes to a height of 1.5 m (4 ft 11 in) and sometimes has hairy branchlets. Its phyllodes are arranged in whorls of 6 to 10, and are more or less cylindrical to flattened, mostly 2–5 mm (0.079–0.197 in), sometimes with a small point on the end, and an impressed vein on the lower surface. There is a linear stipule 0.8–1.2 mm (0.031–0.047 in) long at the base of the phyllode. [2] [3] [4]

The flowers are golden-yellow, borne in heads of 25 to 35 on a peduncle mostly 6–15 mm (0.24–0.59 in) long. Flowering occurs from April to October, [5] and the pods are flat, sessile 25–60 mm (0.98–2.36 in) long, 6–7 mm (0.24–0.28 in) wide, glabrous and sticky. The pods contain oblong seeds around 4 mm (0.16 in) long. [2] [3] [4]

Taxonomy

Acacia adoxa was first formally described in 1972 by the botanist Leslie Pedley in Contributions from the Queensland Herbarium from specimens collected in the Northern Territory by George Chippendale. [4] [6] Leslie later reclassified the species in 2003 as Racosperma adoxum but the name was not accepted by the Australian Plant Census. [7]

Two varieties of A. adoxa are accepted by the Australian Plant Census:

The name of a hybrid between A. adoxa and Acacia spondylophylla is also accepted. [10]

This wattle is included in the subgenus Phyllodineae, section Lycopodiifoliae. [11]

Distribution and habitat

Grey-whorled wattle is widespread on red sandy soils, sandstone and ironstone gravel, and grows on coastal dunes, stony plains and ridges. In Western Australia it is found in the Central Kimberley, Dampierland, Gascoyne, Great Sandy Desert, Little Sandy Desert, Northern Kimberley, Ord Victoria Plain, Pilbara and Tanami IBRA bioregions. [5] It is also found in the central western parts of the Northern Territory. [3] [12]

See also

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References

  1. 1 2 "Acacia adoxa". Australian Plant Census. Retrieved 17 May 2024.
  2. 1 2 3 4 5 George, Alex S. Maslin, Bruce R.; Kodela, Phillip G. (eds.). "Acacia adoxa". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 17 May 2024.
  3. 1 2 3 4 5 "Acacia adoxa". World Wide Wattle. Western Australian Herbarium. Retrieved 5 September 2018.
  4. 1 2 3 4 5 Pedley, Leslie (1972). "A revision of Acacia lycopodiifolia A. Cunn. ex Hook. and its Allies". Contributions from the Queensland Herbarium. 11: 6–8. Retrieved 18 May 2024.
  5. 1 2 "Acacia adoxa". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. ↑ "Acacia adoxa". APNI. Retrieved 17 May 2024.
  7. ↑ "Racosperma adoxum". APNI. Retrieved 17 May 2024.
  8. ↑ "Acacia adoxa var. adoxa". Australian Plant Census. Retrieved 17 May 2024.
  9. ↑ "Acacia adoxa var. subglabra". Australian Plant Census. Retrieved 17 May 2024.
  10. ↑ "Acacia adoxa Pedley var. adoxaAcacia spondylophyllaF.Muell.". Australian Plant Census. Retrieved 18 May 2024.
  11. ↑ "Acacia adoxa". World Wide Wattle. Retrieved 17 May 2024.
  12. ↑ "Acacia adoxa". Northern Territory Government. Retrieved 18 May 2024.
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