Acacia filamentosa

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Acacia filamentosa
Acacia filamentosa.jpg
Near the Gibb River Road
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. filamentosa
Binomial name
Acacia filamentosa
Acacia filamentosaDistMap355.png
Occurrence data from AVH
Synonyms [1]

Racosperma filamentosum(Maslin) Pedley

Acacia filamentosa is a species of flowering plant in the family Fabaceae and is endemic to the north of Western Australia. It is a shrub with ascending, thread-like to curved or terete phyllodes, densely flowered spikes of yellow flowers and linear, crusty to thinly leathery pods.

Contents

Description

Acacia filamentosa is a glabrous shrub that typically grows to a height of 0.9–2 m (3–7 ft) and sometimes has resinous branchlets. Its phyllodes are ascending, coarsely thread-like, curved to shallowly curved, terete, 150–200 mm (5.9–7.9 in) long and about 1 mm (0.039 in) wide with about eight, very obscure veins. The flowers are borne in two densely flowered spikes 20–25 mm (0.79–0.98 in) long and 6 mm (0.24 in) in diameter, in axils on peduncles 5–15 mm (0.20–0.59 in) long. Flowering occurs from June to September, and the pods are crusty to thinly leathery and glabrous, up to 110 mm (4.3 in) long, 3 mm (0.12 in) wide and striated. The seeds are narrowly oblong, 6–7 mm (0.24–0.28 in) long, brown with a yellowish band and a pale yellowish, top-shaped aril. [2] [3] [4] [5] [6]

Taxonomy

Acacia filamentosa was first formally described in 1983 by Bruce Maslin from specimens collected near the Gibb River Road, near the turnoff to Ellenbrae in 1980. [2] [7] The specific epithet (filamentosa) means 'abounding in threads', referring to the phyllodes. [8]

Distribution and habitat

This species of wattle grows on sandstone hills, and is only known from a few locations in the Kimberley region of Western Australia, including Adcock Gorge (about 300 km (190 mi) south-west of Wyndham, Pentecost Downs Station (about 150 km (93 mi) south-west of Wyndham) and near Kalumburu. [3] [5] [6]

Conservation status

Acacia filamentosa is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions. [6]

See also

References

  1. 1 2 "Acacia filamentosa". Australian Plant Census. Retrieved 28 December 2025.
  2. 1 2 Maslin, Bruce R. (1983). "Studies in the genus Acacia (Leguminosae: Mimosoideae) - 13. Four new species from north-western Australia". Nuytsia. 4 (3): 370–373. Retrieved 28 December 2025.
  3. 1 2 Cowan, Richard S. "Acacia filamentosa". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 28 December 2025.
  4. ↑ "Acacia filamentosa". Australian Biological Resources Study. Retrieved 28 December 2025.
  5. 1 2 "Acacia filamentosa". World Wide Wattle. Retrieved 28 December 2025.
  6. 1 2 3 "Acacia filamentosa". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  7. ↑ "Acacia filamentosa". Australian Plant Name Index. Retrieved 28 December 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. 202. ISBN   9780645629538.
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