Agrostis gigantea

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Agrostis gigantea Roth

Poaceae

Life form: grass
Usage: economic plant

Exposure: sun   4

Moisture: moderately moist

Arrangement: alternate
Leaves: decidious

Shape: linear

Division: simple

Shape: not specified
Fruit: caryopsis

4D / f2e9bb 

Inflorescence: not specified

Petals: not specified
Habit: not specified

Growth form: not specified

Taxonomy

Divisio:
Magnoliophyta
Subdivisio:
Magnoliophytina
Classis:
Liliopsida
Subclassis:
Commelinidae
Superordo:
Poanae
Ordo:
Poales

Agrostis gigantea, commonly known as black bent, redtop, is a grass.

Naming

Agrostis gigantea was described by Albrecht Wilhelm Roth in 1788. The name is considered as validly published.

Taxonomy

Agrostis gigantea is a species in the genus Agrostis which contains approximately 239 to 358 species and belongs to the family of the Poaceae (Grass Family).

Characteristics

Growth

The comparatively fast-growing and short-lived grasses have a decumbent habit and reach heights of 1 to 1,3 metres. They spread rapidly, the main growing season is in spring and summer.

Leaves

Agrostis gigantea is deciduous. The dark-green, simple leaves are alternate. They are linear with entire margins and parallel venation. The foliage is dense in summer and porous in winter.

Flowers and Fruits

Agrostis gigantea produces white-yellow flowers from June to August.

The grasses produce an abundance of brown caryopses in summer.

Root System

The plants produce rhizomes which give rise to vegetative spread.

Distribution

Agrostis gigantea is native to the whole of Europe, Turkey, Iraq, the Caucasus, Iran, West-Siberia, East Siberia, Afghanistan, Pakistan, Northwest India, Mongolia, China, Morocco and Algeria and is naturalized in North America, Central America, South America, South Africa, Lesotho and Swaziland, Australia and New Zealand.

Cultivation

The grasses prefer a sunny situation on moderately moist soil. The substrate should be comparatively poor with a pH between 4,5 and 8. The plants need a soil depth of at least 36 centimetres for good growth. They tolerate temperatures down to -35°C (USDA zone 4) and need a frost-free period of at least 13 weeks.

Tolerance of special soil conditions

  • low: soil salinity, drought, calcareous soil
  • medium: anaerobic soil

Uses

Maintenance and Propagation

Propagate by sowing.

Cultivars

Pests and Diseases

Literature

  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: Der große Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
  • Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.

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