Amphibromus fluitans Kirk

Trans. & Proc. New Zealand Inst. 16: 374 (1884) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:EPBC: vulnerable (VU)

Rhizomatous and stoloniferous aquatic or semi-aquatic perennial; culms decumbent (at least when growing in water), sometimes only the inflorescence emergent, to 80 cm high overall. Leaves glabrous, scabrous; blade flat, to 25 cm long and 2–5 mm wide; ligule acute, (3.5–)6.5–12 mm long. Inflorescence to 35 cm long. Spikelets (6.5–)9–15 mm long, 5–12-flowered, lower glume (2–)2.7–3.7 mm long, upper glume (2.5–)3.4–4.5 mm long; lemma 3.7–5 mm long, scabrous to hispid, apical teeth 2, 0.3–0.6 mm long; awn 9–17 mm long, inserted 30–60% of the lemma length from the apex, column and bristle not distinguished; palea from one-quarter to three-quarters as long as lemma. Flowers Nov.–Mar.

GipP, Glep, Gold, GGr, HNF, HSF, MuF, NIS, OtP, OtR, Strz, VRiv, VVP, Wim. Also NSW, Tas. Largely confined to permanent swamps, principally along the Murray River between Wodonga and Echuca, uncommon to rare in the south (e.g. Casterton, Moe, Yarram), probably due to historic drainage of wetlands.

Sometimes forming loose turf-like colonies at the edge of receding waters and then spikelets tend to be smaller than typical (represented by the bracketed values in the above description).

Source: Walsh, N.G. (1994). Poaceae. 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: Val Stajsic, 2020-02-25
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
genus Amphibromus
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Amphibromus fluitans in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Amphibromus fluitans in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Goldfields present native
Greater Grampians present native
Northern Inland Slopes present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Otway Ranges present native
Strzelecki Ranges present native

State distribution

Distribution map
South Australia
New South Wales