Poa annua L.

Annual Meadow-grass

Sp. Pl. 68 (1753) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Variable, bright green, glabrous, tufted annual; culms erect to procumbent, 2–30 cm high. Leaf-blades flat or channelled (folded when young) with boat-shaped tips, to 12 cm long and 5 mm wide; ligules whitish, thinly membranous, truncate, 2–5 mm long. Inflorescence an approximately ovoid panicle, to c 10 cm long and 6 cm wide. Spikelets mostly 3–6-flowered, 3.5–6 mm long; lower glume 1–3-nerved, 1.5–3 mm long; upper glume 3-nerved, 2–4 mm long; lemma 2.5–4 mm long, the 5 nerves usually hairy below c. midway, internerves glabrous; web absent; anthers 0.7–1.3 mm long. Flowers chiefly during winter and spring, but occasional flowering plants may be found throughout the year.

*CVU, *DunT, *EGL, *EGU, *GipP, *Glep, *Gold, *GGr, *HFE, *HNF, *HSF, *LoM, *MonT, *MuF, *MuM, *NIS, *OtP, *OtR, *RobP, *Strz, *VAlp, *VRiv, *VVP, *WaP, *WPro, *Wim. Naturalized in all States. Native to Europe and temperate Asia, widely naturalised elsewhere. A common weed of gardens, lawns and disturbed areas. In drier regions usually confined to irrigated land or margins of streams, billabongs etc.

Genetic studies have shown Poa annua to be tetraploid and of hybrid origin with Poa infirma as the maternal parent (Mao & Huff 2012).

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.
 
References

Mao, Q. & Huff, D.R. (2012). The evolutionary origin of Poa annua L., Crop Science 52: 1910–1922.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
genus Poa
Higher taxa
species Poa annua L.

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Poa annua in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Poa annua in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present naturalised
Murray Mallee present naturalised
Wimmera present naturalised
Glenelg Plain present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Robinvale Plains present naturalised
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Greater Grampians present naturalised
Dundas Tablelands present naturalised
Northern Inland Slopes present naturalised
East Gippsland Lowlands present naturalised
East Gippsland Uplands present naturalised
Wilsons Promontory present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised
Otway Ranges present naturalised
Strzelecki Ranges present naturalised
Monaro Tablelands present naturalised
Highlands-Far East present naturalised
Victorian Alps present naturalised

State distribution

Distribution map
State
Western Australia
Northern Territory
South Australia
Queensland
New South Wales
Australian Capital Territory
Victoria
Tasmania