Green-eared amaranth

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Green-eared amaranth
Amaranthus powellii 5438080.jpg

Green-eared amaranth ( Amaranthus powellii )

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Foxtail family (Amaranthaceae)
Subfamily : Amaranthoideae
Genre : Amaranth ( Amaranthus )
Type : Green-eared amaranth
Scientific name
Amaranthus powellii
S. Watson

The green-eared amaranth ( Amaranthus powellii ) is a species of the genus Amaranth ( Amaranthus ) within the foxtail family (Amaranthaceae).

description

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Amaranthus powellii subsp. powellii : Opened lid capsule with seed and cover sheet (left). The tepals are lanceolate, coarse-skinned to before-leaf-like and often different from one another.
Seeds
Amaranthus powellii subsp. powellii : inflorescence

The green-eared amaranth is an herbaceous plant and reaches heights of 20 to 150 centimeters. The branched stem is almost bare and green below the inflorescence. The shiny, vivid green leaves are rhombic-egg-shaped with a length of up to 20 centimeters.

The flowering period extends from July to September. The entire inflorescence is green, not very dense, the lateral false ears are often upright to upright and much shorter than the terminal false ear. The longer bracts of the female flowers are 5 to 8 millimeters long and have a long spike tip. The bracts are 2 to 4 millimeters long.

The capsule fruit lid tears open when ripe.

The chromosome number is 2n = 32.

ecology

One specimen sometimes develops 42,000 seeds.

Occurrence

The green-eared amaranth is originally widespread in the Neotropics . It is a neophyte in the warmer areas of the world . In Europe , its distribution area extends northward only to northern Germany and Poland . In the Alps , it rises to altitudes over 1000 meters. It thrives in Central Europe on summer-dry to moderately dry, nutrient-rich, humus-rich or raw soils of all kinds. It is a supraregional species of the Chenopodietea class and occurs particularly in societies of the Sisymbrietalia or Polygono-Chenopodietalia, but also in those of the Bidentetea class.

Systematics

One can distinguish between two subspecies:

  • Amaranthus powellii S. Watson subsp. powellii : It is native to the United States, Mexico, Bolivia, Peru and Chile and is a neophyte in Africa, Eurasia, Australia and New Zealand.
  • Amaranthus powellii subsp. bouchonii (Thell.) Costea & Carretero (Syn .: Amaranthus bouchonii Thell. ): It occurs in Europe and North America.

literature

  • Otto Schmeil , Jost Fitschen (greeting), Siegmund Seybold: The flora of Germany and the neighboring countries. A book for identifying all wild and frequently cultivated vascular plants. 95th completely revised u. exp. Edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01498-2 .
  • Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). 2nd, corrected and enlarged edition. Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2007, ISBN 978-3-8001-4990-2 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi (Hrsg.): The fern and flowering plants of Baden-Württemberg. Volume 1: General Part, Special Part (Pteridophyta, Spermatophyta): Lycopodiaceae to Plumbaginaceae. 2nd, supplemented edition. Eugen Ulmer, Stuttgart 1993, ISBN 3-8001-3322-9 .

Individual evidence

  1. ↑ a b c Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp.  354 .
  2. ↑ a b c Amaranthus in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved September 11, 2017.

Web links

Commons : Green-eared Amaranth ( Amaranthus powellii )  - Collection of images, videos and audio files