Polygonum arenastrum Jord. ex Boreau

Hogweed

Fl. Centre France, edn 3, 2: 559 (1857) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Decumbent or prostrate, often mat-forming, annual, to c. 1.5 m diam. Ochreas 3–10 mm long, soon disintegrating. Leaves narrowly elliptic, 5–20 mm long, 2–5 mm wide, sometimes the lower leaves deciduous, margins flat or undulate, rarely slightly recurved, lateral veins more or less obvious. Flowers 1–3 in axillary clusters; perianth 2–3 mm long, the segments united for c. half their length, greenish with pink or white margins. Fruiting perianth not or barely enlarged. Nut with 2 equal flat or convex faces, and a narrower concave face, 2–2.5 mm long, mid to dark brown, minutely roughened. Flowers mostly summer.

*CVU, *DunT, *GipP, *Gold, *HNF, *HSF, *MuF, *MSB, *NIS, *OtP, *RobP, *Strz, *VAlp, *VRiv, *VVP, *WaP, *Wim. Also WA, SA, Qld, NSW, ACT, Tas. Native almost throughout Europe. An occasional weed of bare open ground (including cracks in pavements, roadsides, fallow paddocks etc.) mostly on compacted or heavier soils.

Formerly confused with Polygonum aviculare.

Source: Walsh, N.G. (1996). Polygonaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2019-03-29
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Caryophyllanae
family Polygonaceae
genus Polygonum
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Polygonum arenastrum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Polygonum arenastrum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Murray Scroll Belt present naturalised
Robinvale Plains present naturalised
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Dundas Tablelands present naturalised
Northern Inland Slopes present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised
Strzelecki Ranges present naturalised
Victorian Alps present naturalised

State distribution

Distribution map
State
Western Australia
South Australia
Queensland
New South Wales
Australian Capital Territory
Victoria
Tasmania