Agrostis gigantea, known by its common names black bent[2] and redtop, is a perennial grass of the Agrostis genus.
It is native to Europe, but in the cooler areas of North America was widely used as a pasture grass until the 1940s. Although it has largely been replaced by soybeans and more palatable grasses, it still gets some use in poor soils. It was one of the grasses planted in areas disturbed by the Trans-Alaska Pipeline. It generally does well in response to fires, due to survival of rhizomes and seeds.[3]
It can be found in open woodland, rough grassland, hedgerows, roadsides and waste ground, and as a weed on arable land.
This species is similar to Agrostis stolonifera, with the key difference being that the latter has stolons. In fact the two are sometimes treated as a single species, and it is not always clear precisely what an author means by Agrostis alba or Agrostis stolonifera.[3]
Many internet sources[which?] describe Agrostis capillaris as being the tallest of the bent species. However C E Hubbard describes its height as ranging from 10 to 70 centimeters in high, whereas Agrostis gigantea is 40–120 centimetres (16–47 in). Marjorie Blamey, Richard and Alastair Fitter also describe black bent as being taller.[4][5]
^John Hilty (November 23, 2007). "Redtop". Grasses, Sedges, and Non-Flowering Plants of Illinois. Archived from the original on December 12, 2007. Retrieved December 17, 2007.
^BSBI List 2007(xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
^ ab"Agrostis gigantea". Fire Effects Information System. United States Forest Service.
^C E Hubbard (1978). Grasses. Penguin Books.
^Marjorie Blamey, Richard and Alistair Fitter (2003). Wild Flowers of Britain and Ireland. A. & C. Black. ISBN 0-7136-5944-0.
Agrostisgigantea, known by its common names black bent and redtop, is a perennial grass of the Agrostis genus. It is native to Europe, but in the cooler...
pastures throughout the UK. Plants Profile for Agrostis Capillaris Retrieved 14 March 2010. "Agrostis capillaris". Germplasm Resources Information Network...
Agrostis alba may refer to: Agrostisgigantea, a grass species Poa nemoralis, a grass species This disambiguation page lists articles associated with...
and lead. "Agrostis castellana Boiss. & Reut". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 28 January 2022. "Agrostis castellana...
Red Top, Red-top or Redtop may refer to Agrostisgigantea - known as "Black Bent" or "redtop grass" Brewster Red Tops, previous name of the Brewster Whitecaps...
various plants, including Brachypodium sylvaticum, Holcus lanatus and Agrostisgigantea. Satyrinae of the Western Palearctic Mario Maier: Europäische Schmetterlinge...
bentgrass populations up to 14 kilometres away. Cross-pollinating Agrostisgigantea was even found at a distance of 21 kilometres. The grower, Scotts...
trachycaulum var. trachycaulum, A. trachycaulum var. unilaterale Agrostisgigantea, A. stolonifera, A. tenuis Alopecurus geniculatus, A. pratensis Bouteloua...
35 in). Adults are on wing in May and June. The larvae feed on Agrostisgigantea, Agrostis stolonifera, Brachypodium sylvaticum, Calamagrostis arundinacea...
balds in the southern Appalachians, where it occurs with redtop (Agrostisgigantea), timothy (Phleum pratense), Canada bluegrass (Poa compressa), Kentucky...
Spain and Morocco. The larvae feed on Dactylis glomerata, Agrostis castellana, Celtica gigantea and Festuca ampla. Larval development takes two years. Wikimedia...
bent Agrostis capillaris Black bent Agrostisgigantea Highland bent Agrostis castellana * Creeping bent Agrostis stolonifera Blown-grass Agrostis avenacea...
these areas is Lolium perenne.: 270 Other herbaceous species are Agrostisgigantea, Avena barbata (subspecies barbata), Centaurea calcitrapa (var. calcitrapa)...
pseudoacacia. The grassy vegetation in the meadow consists of forage plants: Agrostisgigantea, Lolium perenne, etc. High humidity develops mesophilic and hydrophilic...
moss, and lichen. Grasses are represented by the genera Calamagrostis, Agrostis, and Festuca. Parastrephia lepidophylla and Margyricarpus are small bush...
introduced, rare Agrostis canina - common Agrostis capillaris - common Agrostisgigantea - common Agrostis stolonifera - common Agrostis straminea Alopecurus...
there might be a second generation in warmer areas. The larvae feed on Agrostis, Arrhenatherum elatius, Brachypodium sylvaticum, Calamagrostis arundinacea...
Global Information
