Myriophyllum glomeratum Schindl.

Clustered Water-milfoil

in Engl., Pflanzenr. IV 225 (Heft 23): 103 (1905) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Annual marsh herb; stems more or less erect, 3–10 cm tall, mostly c. 0.5 mm diam., rooting only at the base. Leaves alternate, dimorphic; submerged leaves thin, linear, rarely trifid, 5–6 mm long; emergent leaves thick and fleshy, linear, curved, c. 2.5 mm long. Bracteoles linear to narrow-triangular, c. 0.3 mm long, white; flowers 2 or 3 per axil. Male flowers sessile or shortly pedicellate; sepals absent; petals 4, 0.8–1.1 mm long, reddish; stamens 4. Female flowers sessile; sepals and petals absent; ovary 4-celled, styles clavate, becoming reflexed, stigmas white. Fruit cylindric to urceolate, golden or reddish-brown; mericarps cylindric, 0.8–1.2 mm long, swollen and slightly wrinkled at base, smooth and tapering above, with an oblique collar. Flowers Sep.–Jan.

CVU, DunT, Gold, LoM, MuF, MuM, NIS, VRiv, VVP, Wim. Also SA, NSW, Tas. Scattered widely across northern and western Victoria where it grows in damp or swampy areas and is often inconspicuous amongst other larger swamp plants.

Often grows with the similar Myriophyllum integrifolium, but can be distinguished by its fascicled flowers, 4 stamens and different fruit shape.

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


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Myriophyllum glomeratum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Myriophyllum glomeratum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Goldfields present native
Central Victorian Uplands present native
Dundas Tablelands present native
Northern Inland Slopes present native

State distribution

Distribution map
South Australia
New South Wales