Agrostis gigantea
| Redtop | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | |
| (unranked): | |
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| Species: | A. gigantea
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| Binomial name | |
| Agrostis gigantea Roth, 1788
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| Synonyms | |
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Agrostis alba[1] | |
Agrostis gigantea, known by its common name 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 Although it has largely been replaced by soybeans and more palatable grasses, it still gets some use in poor soils.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.[2]
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.[2]
Many internet sources describe Agrostis capillaris as being the tallest of the bent species. However C E Hubbard describes its height as ranging from 10 to 70 cm high, whereas Agrostis gigantea is 40 to 120 cm. Marjorie Blamey, Richard and Alastair Fitter also describe Black Bent as being taller.[3][4]
Description
The leaves are dull green. The ligule is blunt, but toothed and up to 6mm long.
The panicle is open and loose, of green or purplish colour. It flowers from June to August.
References
- ^
John Hilty (2007-11-23). "Redtop". Grasses, Sedges, and Non-Flowering Plants of Illinois. Archived from the original on 12 December 2007. Retrieved 2007-12-17.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ a b "Agrostis gigantea". Fire Effects Information System. United States Forest Service.
- ^ Grasses by C E Hubbard, 1978, published by Penguin books
- ^ Wild Flowers of Britain and Ireland|author=Marjorie Blamey, Richard and Alistair Fitter|year=2003|ISBN=0-7136-5944-0
External links
Media related to Agrostis gigantea at Wikimedia Commons
Data related to Agrostis gigantea at Wikispecies
- "Agrostis gigantea Roth". Wisconsin Botanical Information System. Retrieved 2007-12-13. [dead link]
- "red top". Ada Hayden Herbarium. Archived from the original on 28 December 2007. Retrieved 2007-12-13.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - Clayton, W.D.; Vorontsova, M.S.; Harman, K.T.; Williamson, H. "Agrostis gigantea". GrassBase - The Online World Grass Flora. Royal Botanic Gardens, Kew.
- "Black Bent". Skye Flora. Archived from the original on 11 November 2007. Retrieved 2007-12-13.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - "Agrostis gigantea Roth". Grassland Species Profiles. Retrieved 2007-12-13.