Zostera muelleri Irmisch ex Asch.

Dwarf Grass-wrack

Linnaea 35: 168 (1867) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Roots 2, or 2–10 in 2 groups at each node. Leaf sheath 5(–20) cm long, persisting longer than leaves. Leaves 2–4(–5) per shoot, 5–60 cm long, 1–3 mm wide; apex rounded with a notch; longitudinal veins 3. Generative branches 5–30 cm long, with 1–several spathes. Spadix linear-lanceolate; with 4–12 broadly triangular bracts, each enclosing an anther.     Flowers and fruits Oct.–Mar.

EGL, GipP, Glep, OtP, VVP, WaP, WPro. Common in inlets and estuaries on mud and sand in shallow, calm waters.

There is overlap in many of the morphological features used to distinguish Z. muelleri, Z. murconata Hartog, and Z. capricorni. Further research is required to determine if these taxa represent good species or are better treated as subspecies.

Plants growing in estuarine situations usually have longer leaves with longer flowering branches than the form which occurs in lagoons and other land-locked waters.

Source: Conn, B.J. (1994). Zosteraceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Andre Messina, 2014-08-05
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
family Zosteraceae
genus Zostera
Higher taxa


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

State distribution

Distribution map
South Australia
New South Wales