Shark tooth wattle
A. littorea flowers and foliage
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Fabaceae
Subfamily: Caesalpinioideae
Clade: Mimosoid clade
Genus: Acacia
Species:
A. littorea
Binomial name
Acacia littorea
Occurrence data from AVH
A. littorea habit
A. littorea heavy with flower

Acacia littorea, also known as the shark tooth wattle,[1][2][3] is a shrub belonging to the genus Acacia and the subgenus Phyllodineae.

Description

The dense pungent shrub typically grows to a height of 0.5 to 3.0 metres (1.6 to 9.8 ft) and produces yellow flowers from August to November.[4] It has glabrous but prominently ribbed branchlets. The green, pungent and somewhat crowded phyllodes are ascending on the branchlets. They have an interesting obtriangular to obdeltate shape resembling a sharks tooth. The phyllodes are 7 to 17 millimetres (0.28 to 0.67 in) long and 5 to 15 mm (0.20 to 0.59 in) and sometimes larger. The simple inflorescences have globular heads containing 8 to 15 pale-yellow flowers. After flowering blackish to yellowish linear to curved seed pods that are around 6 centimetres (2.4 in) in length with a width of 2.5 to 3 mm (0.10 to 0.12 in). The pods contain shiny brown oblong seeds arranged longitudinally which are 2.5 to 3 mm (0.10 to 0.12 in) long.[5]

Taxonomy

The species was first formally described by the botanist Bruce Maslin in 1978 as part of the work Studies in the genus Acacia (Mimosaceae) – 8 A revision of the Uninerves – Triangulares, in part (the tetramerous species) published in the journal Nuytsia.[6]

The type specimen was collected by Bruce Maslin along the shoreline of Princess Royal Harbour near Albany in 1975.[5]

Several synonyms exist: Acacia dolabriformis, Acacia trapezoides, Acacia cuneata var. glabra, Acacia decipiens var. triangularis, Mimosa decipiens and Acacia praemorsa.[6]

The species is closely related to Acacia truncata.[5]

Distribution

It is native to an area in the South West, Great Southern and Peel regions of Western Australia.[4] The bulk of the population is found from Busselton east to Bremer Bay. An isolated population is found on Rottnest Island.[5] A. littorea grows mostly on coastal dunes in deep sandy soils and in limestone area.[4] It is commonly found in heath land communities and can be a dominant species.[5]

Cultivation

A. littorea is commercially available in seed form[7] or as tubestock.[8] It prefers a sunny position and well-drained soils and suits a coastal garden. The species is drought- and frost-tolerant. It is fast-growing but short-lived and suitable for erosion control or as a windbreak.[1]

See also

References

  1. 1 2 "Acacia littorea – Wattle". Gardening with Angus. Retrieved 22 August 2018.
  2. ↑ Peter Llewellyn (2018). "Acacia littorea Shark's-tooth Wattle". UK Wildflowers. Retrieved 22 August 2018.
  3. ↑ "Survey for the Western Ringtail Possum Pseudocheirus occidentalis within part of Lots 3000 and 1523, Emu Point Drive, Albany, Western Australia" (PDF). Green Iguana. August 2007. Retrieved 22 August 2018.
  4. 1 2 3 "Acacia littorea". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  5. 1 2 3 4 5 "Acacia littorea". World Wide Wattle. Western Australian Herbarium. Retrieved 23 August 2018.
  6. 1 2 "Acacia littorea Maslin". Atlas of Living Australia. Global Biodiversity Information Facility. Retrieved 23 August 2018.
  7. ↑ "Acacia littorea". Australian Seed. Retrieved 23 August 2018.
  8. ↑ "Acacia littoera". The Tube Nursery. Retrieved 23 August 2018.
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