Acacia dielsii
| Acacia dielsii | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Caesalpinioideae |
| Clade: | Mimosoid clade |
| Genus: | Acacia |
| Species: | A. dielsii
|
| Binomial name | |
| Acacia dielsii | |
| Occurrence data from AVH | |
| Synonyms[1] | |
| |
Acacia dielsii is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a shrub with inclined to erect, terete phyllodes, spherical heads of golden yellow flowers and pods readily breaking into one-seeded, spindle-shaped sections.
Description
Acacia dielsii is shrub that typically grows to a height of 0.5 to 2 metres (2 to 7 ft) and has terete or weakly-angled, glabrous branchlets. Its phyllodes are inclined to erect, straight to curved and terete, 10–35 mm (0.39–1.38 in) long and 0.7–0.9 mm (0.028–0.035 in) wide, glaucous when young, ageing to pale green and glabrous. There are 14 to 18 slightly raised veins on the phyllodes. The flowers are arranged in two spherical heads in axils on peduncles 2–4 mm (0.079–0.157 in) long with persistent hooded bracts. The heads are 2.5–3.5 mm (0.098–0.138 in) in diameter with 8 to 17 golden yellow flowers. Flowering occurs from February to September and the pods are up to 30 mm (1.2 in) long and 1.2–1.8 mm (0.047–0.071 in) wide and thin, readily breaking into one-seeded, spindle-shaped sections. The seeds are narrowly oblong, 2.5–3.0 mm (0.098–0.118 in) long tan, mottled and slightly glossy and lack an aril.[2][3][4][5]
Taxonomy
Acacia dielsii was first formally described in 1904 by the botanist Ernst Georg Pritzel in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie from specimens he collected 5 km (3.1 mi) south of Tammin in 1901.[3][6][7]
Acacia dielsii is closely related to A. nivea and A. obesa which together make up the "A. dielsii group" of wattles.[3]
The specific epithet (dielsii) honours the German botanist Ludwig Diels.[8]
Distribution and habitat
This species of wattle occurs in a belt from the Murchison River, east of Kalbarri, to the Newdegate area, where it grows in sandy, loamy and lateritic soils in open scrub and shrubland,[2][3] in the Avon Wheatbelt, Coolgardie, Geraldton Sandplains, Mallee and Yalgoo bioregions of south-western Western Australia.[5]
Conservation status
Acacia dielsii is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.[5]
See also
References
- ^ a b "Acacia dielsii". Australian Plant Census. Retrieved 29 September 2025.
- ^ a b Cowan, Richard S. Kodela, Phillip G. (ed.). "Acacia dielsii". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 29 September 2025.
- ^ a b c d "Acacia dielsii". World Wide Wattle. Department of Parks and Wildlife. Retrieved 23 January 2019.
- ^ "Acacia dielsii". Australian Biological Resources Study. Retrieved 29 September 2025.
- ^ a b c "Acacia dielsii". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Acacia dielsii". APNI. Retrieved 29 September 2025.
- ^ Diels, Friedrich Ludwig; Pritzel, Ernst Georg (1904). "Fragmenta Phytographiae Australiae occidentalis. Beiträge zur Kenntnis der Pflanzen Westaustraliens, ihrer Verbreitung und ihrer Lebens- Verhältnisse". Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie. 35 (2–3): 294–295. Retrieved 29 September 2025.
- ^ George, Alex S.; Sharr, Francis A. (2023). Western Australian Plant Names and Their Meanings - A Glossary (fifth ed.). Kardinya: Four Gables Press. p. 185. ISBN 9780645629538.