Acacia hilliana

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Hill's tabletop wattle
Acacia hilliana ii.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Clade: Mimosoideae
Genus: Acacia
Species:
A. hilliana
Binomial name
Acacia hilliana
Acacia hillianaDistMap433.png
Occurrence data from AVH
Acacia hilliana flowers Acacia hilliana flowers.jpg
Acacia hilliana flowers
Acacia hilliana habit Acacia hilliana habit.jpg
Acacia hilliana habit

Acacia hilliana, commonly known as Hill's tabletop wattle but also known as sandhill wattle and Hilltop wattle, [1] is a shrub belonging to the genus Acacia and the subgenus Juliflorae. It is native to northern Australia.

Contents

The Indigenous Australian peoples the Banyjima know it as Bundaljingu and the Nyangumarta know it as Puntanungu. [1]

Description

The low spreading, viscid shrub typically grows to a height of 0.2 to 1 metre (1 to 3 ft). [2] The obscurely ribbed branches normally spread horizontally giving the shrub a flat-topped appearance. The green to grey-green phyllodes are solitary or sometimes in clusters of two or three at the nodes. Each phyllode is 2 to 7 centimetres (0.8 to 2.8 in) in length and has a diameter of about 1 millimetre (0.04 in) and are straight or curve shallowly upward. [1] It blooms from March to October producing golden yellow flowers. [2] The simple inflorescences have an erect flower spike that is 10 to 45 mm (0.4 to 1.8 in) in length. Following flowering flat, thick and linear dark brown seed pods with a length of 2 to 8 cm (0.8 to 3.1 in) and a width of 2 to 6 mm (0.08 to 0.24 in). The erect and woody pods are sticky with resin and have an odour resembling like citronella or lemon grass. The ellipsoidal dull to slightly shiny brown seeds are 3 to 5.5 mm (0.12 to 0.22 in) long. [1]

Taxonomy

The species was first formally described by the botanist Joseph Maiden in 1917 as part of the Alfred James Ewart and Olive Blanche Davies work Appendix IV: Acacias of the Northern Territory. The Flora of the Northern Territory. It was reclassified as Racosperma hillianum by Leslie Pedley in 1987 then transferred back the genus Acacia in 2001. [3]

The species name honours Gerald Freer Hill who collected the type specimen used by Maiden to prepare the description of the plant. [1]

Distribution

In Western Australia it is scattered throughout the Kimberley and Pilbara regions of Western Australia usually on rocky ranges and plateaus, among sand dunes and on sand plains growing in red sandy and stony soils. [2] It is also found in the Northern Territory and extends into far western Queensland. [1]

See also

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References

  1. 1 2 3 4 5 6 "Acacia hilliana". Wattles of the Pilbara. Western Australian Herbarium. Retrieved 17 September 2018.
  2. 1 2 3 "Acacia hilliana". FloraBase . Western Australian Government Department of Parks and Wildlife.
  3. "Acacia hilliana Maiden Hill's Tabletop Wattle". Atlas of Living Australia. Global Biodiversity Information Facility . Retrieved 17 September 2018.