Amaranthus powellii S.Watson

Powell's Amaranth

Proc. Amer. Acad. Arts 10: 347 (1875) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Erect or decumbent annual to 1.3 m high. Stems angled or grooved, glabrous to sparsely pubescent, sometimes reddish. Leaves long-petiolate, ovate to rhombic, lamina 1–10 cm long, 0.6–5 cm wide, entire; margin sometimes undulate; apex sometimes shortly mucronate. Inflorescence simple or few-branched, terminal and usually upper-axillary, the spikes to c. 8 cm long and 10–15 mm diam. Flowers unisexual; longest bracts and bracteoles, 4–6 mm long, broad and membranous at base, acuminate, strongly spinescent; tepals 3–5, oblong to narrowly oblanceolate, 2.5–3 mm long, acute; stamens as many as tepals. Utricle circumsciss, subequal to or slightly exceeding perianth; style-bases thick; seed discoid, 1–1.5 mm diam., brown, shiny. Flowers Dec.–May.

*CVU, *EGL, *EGU, *GipP, *Gold, *HNF, *HSF, *NIS, *VRiv, *VVP, *WaP, *Wim. Also naturalised WA, SA, Qld, NSW, ACT, Tas. Native to North America. A weed of gardens, crops and wasteland, scattered and common across southern Victoria, uncommon north of the Great Dividing Range (Castlemaine, Benalla and Bright areas).

Most early records (e.g. Willis 1973) of Amaranthus hybridus belong to this species.

Source: Walsh, N.G. (1996). Amaranthaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-04-18
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Caryophyllanae
family Amaranthaceae
genus Amaranthus
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Amaranthus powellii in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Amaranthus powellii in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Gippsland Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Northern Inland Slopes present naturalised
East Gippsland Lowlands present introduced
East Gippsland Uplands present introduced
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory