Acacia abrupta

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Acacia abrupta
Acacia abrupta.jpg
Type specimen [1]
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. abrupta
Binomial name
Acacia abrupta
Acacia abruptaDistMap4.png
Occurrence data from Australasian Virtual Herbarium
Synonyms [2]

Racosperma abruptum(Maiden & Blakely) Pedley

Acacia abrupta is a species of flowering plant in the family Fabaceae and is endemic to arid parts of central and western Australia. It is a spreading, glabrous, resinous shrub with linear phyllodes that are round on cross-section, heads of golden-yellow flowers, and linear pods.

Contents

Description

Acacia abrupta is a spreading, resinous, glabrous shrub that typically grows to a height of 0.6–3 m (2 ft 0 in – 9 ft 10 in) and has light grey bark. The phyllodes are dark green, upright to erect, linear and round in cross-section, usually 30–50 mm (1.2–2.0 in) long and 0.5–1 mm (0.020–0.039 in) wide. The flowers are borne in globe-shaped heads, sometimes the heads in a raceme on a peduncle 8–12 mm (0.31–0.47 in) long, the heads 2–4 mm (0.079–0.157 in) long with 25 to 35 golden-yellow flowers. Flowering occurs from July to September and the pods are linear, up to 50 mm (2.0 in) long and 2.5–3.0 mm (0.098–0.118 in) long with shallow constrictions between the seeds. The seeds are about 4 mm (0.16 in) long with a conspicuous aril. [3] [4] [5] [6] [7]

Taxonomy

Acacia abrupta was first formally described in 1927 by the botanists Joseph Maiden and William Blakely in the Journal of the Royal Society of Western Australia from specimens collected by Richard Helms on a sandplain in the Great Victoria Desert, during the Elder Scientific Exploring Expedition in 1891. [8] [9] The specific epithet (abrupta) means "broken off", referring to the abrupt tip of the phyllodes. [10]

This species is closely related to A. ascendens , and can be mistaken for A. helmsiana which shares the same habitat. [3] [4] [5]

Distribution

This species is native to central Western Australia and the south-west of the Northern Territory where it is found on sand dunes, sandplains and gravelly hillslopes growing in red sandy lateritic based soils. It occurs in the Central Ranges, Gascoyne, Gibson Desert, Great Sandy Desert, Great Victoria Desert, Little Sandy Desert, Murchison and MacDonnell Ranges bioregions of Western Australia and the Northern Territory. [6] [7]

See also

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References

  1. ↑ "Acacia abrupta Maiden & Blakely:K000791524". GBIF.
  2. 1 2 "Acacia abrupta". Australian Plant Census. Retrieved 6 December 2022.
  3. 1 2 "Acacia abrupta". World Wide Wattle. Western Australian Herbarium . Retrieved 25 May 2019.
  4. 1 2 "Acacia abrupta". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water. Retrieved 7 December 2023.
  5. 1 2 Tindale, Mary D.; Kodela, Phillip (2001). Orchard, Anthony E.; Wilson, Annette J.G. (eds.). Flora of Australia (PDF). pp. 11–12. Retrieved 6 December 2023.
  6. 1 2 "Acacia abrupta". Northern Territory Government. Retrieved 7 December 2023.
  7. 1 2 "Acacia abrupta". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  8. ↑ "Acacia abrupta'". APNI. Retrieved 7 December 2023.
  9. ↑ Maiden, Joseph H.; Blakely, William F. (1927). "Descriptions of fifty new species and six varieties of western and northern Australian Acacias, and notes on four other species". Journal of the Royal Society of Western Australia. 13: 6–7. Retrieved 7 December 2023.
  10. ↑ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 125. ISBN   9780958034180.
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