Myriophyllum pedunculatum Hook.f.

Mat Water-milfoil

London J. Bot. 6: 474 (1847) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Perennial marsh, aquatic or emergent herb; stems mat-forming, rooting at the nodes, or more or less erect, to 25 cm tall, c. 1 mm diam. Leaves opposite, linear to terete or filiform, with a terminal gland, 4–22 mm long, margins entire or with 1 or 2 lobes. Bracteoles linear to oblong or triangular, 0.4–0.7 mm long, entire or toothed, larger in male flowers; flowers solitary. Male flowers initially sessile, pedicel elongating to 1–4.5 mm; sepals 4, linear to ovate, 0.7–1.5 mm long; petals 4, 1.7–2.5 mm long, yellow to red; stamens 8. Female flowers sessile or shortly pedicellate; sepals filiform to triangular, c. 0.25 mm long, long persistent; petals absent; ovary 4-celled, styles attenuate, reflexed, stigmas white to red. Fruit cubiform, reddish-purple to black; mericarps more or less teardrop-shaped, 1–1.6 mm long including style, attenuate, smooth or warty.

CVU, EGL, GipP, Glep, GGr, HFE, HNF, HSF, MonT, OtP, SnM, VAlp, VRiv, VVP, WPro.

3 subspecies, 2 occurring in Australia.

Source: Jeanes, J.A. (1996). Haloragaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Hero image
Distribution map


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Myriophyllum pedunculatum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Myriophyllum pedunculatum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Gippsland Plain present native
Otway Plain present native
Central Victorian Uplands present native
Greater Grampians present native
East Gippsland Lowlands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Monaro Tablelands present native
Highlands-Far East present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
New South Wales
Australian Capital Territory