Acacia arcuatilis is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a rounded, spreading shrub with curved phyllodes, racemes of usually two spherical heads of yellow flowers in axils, and linear pods up to 60 mm (2.4 in) long.
| Acacia arcuatilis | |
|---|---|
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Caesalpinioideae |
| Clade: | Mimosoid clade |
| Genus: | Acacia |
| Species: | A. arcuatilis
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| Binomial name | |
| Acacia arcuatilis | |
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| Occurrence data from AVH | |
Description
editAcacia arcuatilis is a low, rounded, spreading shrub that typically grows to a height of 40–80 cm (16–31 in). Its branchlets are covered with silky hairs. Its phyllodes are curved, sometimes in a complete circle, mostly 30–60 mm (1.2–2.4 in) long and 0.5–1.3 mm (0.020–0.051 in) in diameter. The phyllodes are grey-green to almost glaucous with eight broad, flat-topped veins with hairs in the narrow furrows between the veins.[2][3][4][5]
The species flowers from June to August producing spherical yellow flowers in usually two spherical, sessile heads 4–5 mm (0.16–0.20 in) in diameter, each head with 10 to 22 golden flowers in each axil. Following flowering, thinly crust-like, linear pods up to 60 mm (2.4 in) long and 1.5–2 mm (0.059–0.079 in) wide, slightly raised over and constricted between each of the seeds. The seeds are arranged longitudinally, elliptic, 2.0–2.5 mm (0.079–0.098 in) long, glossy and mottled with a conical aril about as long as the seed.[2][3][4][5]
Taxonomy
editAcacia arcuatilis was first formally described in 1999 by Richard Cowan and Bruce Maslin in the journal Nuytsia from specimens collected 6.5 km (4.0 mi) south of Kulin in 1973.[3][6] The specific epithet (arcuatilis) means 'curved like a bow', referring to the phyllodes.[2]
Distribution and habitat
editThis species of wattle grows in mallee, open scrub and heath on undulating plains or rises from near Bindi Bindi to Ongerup and near Hyden in the Avon Wheatbelt, Esperance Plains and Mallee bioregions of south-western Western Australia.[2][4]
Conservation status
editAcacia arcuatilis is listed as "Priority Two" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[4] meaning that it is poorly known and from one or a few locations.[7]
See also
editReferences
edit- ^ "Acacia arcuatilis". Australian Plant Census. Retrieved 20 October 2024.
- ^ a b c d Maslin, Bruce R.; Kodela, Phillip G. "Acacia arcuatilis". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 20 October 2024.
- ^ a b c Maslin, Bruce R.; Chapman, Alexander S. (1999). "Acacia miscellany 19. The taxonomy of some Western Australian species Acacia section Juliflorae with 4-merous flowers (Leguminosae: Mimosoideae)". Nuytsia. 12 (3): 473. Retrieved 20 October 2024.
- ^ a b c d "Acacia arcuatilis". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ a b "Acacia arcuatilis". World Wide Wattle. Retrieved 20 October 2024.
- ^ "Acacia arcuatilis". APNI. Retrieved 20 October 2024.
- ^ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Biodiversity, Conservation and Attractions. Retrieved 20 October 2024.