Alternanthera denticulata R.Br.

Lesser Joyweed

Prodr. 417 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Trailing to weakly ascending annual or perennial, stems to c. 50 cm long or more, pubescent (at least when young) along opposite lines on internerves and at nodes. Leaves oblong or narrowly elliptic 25–70 mm long, 2–8 mm wide, glabrescent; margins irregularly and minutely callus-toothed. Flowers in axillary spherical to ovoid spikes, 4–8 mm long; bracts and bracteoles acuminate, mostly 1–2 mm long; tepals equal, lanceolate, usually 2.5–3.5 mm long and under 1 mm wide, glabrous, white or pinkish, remaining free to base; fertile stamens usually 3, alternting with staminodes, rarely staminodes absent. Fruit broadly obcordate, c. 1 mm long, 1.5 mm wide. Flowers most of year, mainly Oct.–Jan.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MuF, MuM, MSB, NIS, OtP, OtR, RobP, VRiv, VVP, WaP, Wim. All States. Widespread and common almost throughout the lowlands, inhabiting margins of swamps, rivers etc.

Although usually distinctive, A. denticulata may be difficult to discern from A. sp. 1. As well as the features outlined in the key, the bracts, bracteoles and tepals of A. denticulata tend to be longer and relatively narrower than A. sp. 1.

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: Frank Udovicic, 2014-11-12
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Caryophyllanae
family Amaranthaceae
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Alternanthera denticulata in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Alternanthera denticulata in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Scroll Belt present native
Robinvale Plains present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native

State distribution

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