Myriophyllum salsugineum Orchard

Lake Water-milfoil

Brunonia 4: 48 (1981) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Perennial aquatic herb; stems 0.3–2 m long, mostly 1.5–2 mm diam., rooting mainly at the base. Leaves dimorphic, in whorls of 4 or 5; submerged leaves ovate, mostly 12–25 mm long, pectinate, with 10–18 pinnae; emergent leaves ovate, mostly 4–8 mm long, margins entire or minutely dentate. Bracteoles oblong, 1–2 mm long, green to purple; flowers solitary, sessile. Male flowers: sepals 4, triangular, c. 0.3 mm long; petals 4, 2.6–3.5 mm long, green to purple, caducous; stamens 8. Female flowers: sepals absent; petals vestigial; ovary 4-celled, styles conical, stigmas dark red, smooth to minutely papillose. Fruit globose, deep purplish-black; mericarps ovoid, 2–2.5 mm long, rounded, smooth to minutely papillose. Flowers Sep.–Jan.

Brid, CVU, EGL, GipP, Glep, HSF, MuM, OtP, VRiv, VVP, WaP, WPro, Wim. Also WA, SA, NSW, Tas. Widespread in western Victoria but more sporadic in the east. Grows in lakes and slow-flowing watercourses.

This is a distinctive species, recognizable even when sterile from most of its coexisting Myriophyllum species by its size and by its large, dark green, sessile, pectinate, submerged leaves (Orchard 1985).

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.
Updated by: Val Stajsic, 2017-08-16
 
References

Orchard, A.E. (1985). Myriophyllum (Haloragaceae) in Australasia. II. The Australian Species, Brunonia 8: 173-291.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder [Saxifraganae]
order Saxifragales
family Haloragaceae
genus Myriophyllum
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Myriophyllum salsugineum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Myriophyllum salsugineum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Central Victorian Uplands present native
East Gippsland Lowlands present native
Wilsons Promontory present native
Highlands-Southern Fall present native

State distribution

Distribution map
State
Western Australia
South Australia
New South Wales
Victoria
Tasmania