Agrostis gigantea Roth

Red-top Bent

Tent. Fl. Germ. 1: 31 (1788) APNI

Taxonomic status:Accepted

Occurrence status:Extinct

Establishment means:Introduced

Rhizomatous perennial, culms ascending to erect, to 150 cm high. Leaves glabrous; blade flat or inrolled, smooth or slightly scabrous, to 20 cm long and 8 mm wide; ligule obtuse, usually toothed, to 6 mm long. Inflorescence a usually somewhat contracted panicle, 8–25 cm long, the branches remaining inclined to the main axis. Clavate apex of pedicel scabrous. Spikelets 2–3 mm long, purplish-brown to, rarely, green; glumes subequal, firmly membranous, narrowly acute, scabrous along the keel; lemma membranous, with shortly hairy callus, apex truncate or the nerves exserted as short points, two-thirds to three-quarters as long as glumes, rarely a weak subterminal awn present, not exceeding the lemma apex; palea about half as long as lemma. Flowers Nov.–Feb.

Naturalized in all States except NT, North America, New Zealand. Indigenous to much of Europe and temperate Asia. Known with certainty in Victoria from suburban Melbourne, Geelong area, Healesville, Oxley area and Mt Buffalo, but no reliable collections made in Victoria since 1961.

References in early literature to this species are attributable to misdeterminations of Agrostis capillaris and A. stolonifera.

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, 2019-01-08
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Poaceae
genus Agrostis
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Agrostis gigantea in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Agrostis gigantea in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Riverina extinct introduced
Gippsland Plain extinct introduced
Otway Plain extinct introduced
East Gippsland Lowlands extinct introduced
Highlands-Southern Fall extinct introduced
Victorian Alps extinct introduced

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory