Dull-flowered bulrush

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Dull-flowered bulrush
Dull flowered bulrush (Juncus subnodulosus), illustration

Dull flowered bulrush ( Juncus subnodulosus ), illustration

Systematics
Monocots
Commelinids
Order : Sweet grass (Poales)
Family : Rush Family (Juncaceae)
Genre : Rushes ( Juncus )
Type : Dull-flowered bulrush
Scientific name
Juncus subnodulosus
closet

The dull-flowered rush ( Juncus subnodulosus , syn .: Juncus obtusiflorus Ehrh. Ex Hoffm. ), Also called nodular rush , is a species of the rush family (Juncaceae).

description

The overwintering green bulrush is a perennial herbaceous plant with long runners that forms loose lawns with a strong rootstock . It reaches heights between 40 and 130 centimeters. The stems grow upright. Sterile shoots bear at the end of a stalk-like sheet, flowering shoots two nearly round in cross-section, quergekammerte and 2 to 4 millimeters thick leaves . The auricles of the leaf sheaths are brownish, short and rather coarse.

When young, the inflorescence is a very light, strongly branched, loose spiral with 10 to 50, sometimes 100 partial inflorescences with branches that protrude at right or obtuse angles, rarely bent back. The branches of the second or higher order are conspicuously sparse. The partial inflorescences reach about 5 millimeters in length and are five to twelve flowers. The up to 3 millimeter long tepals of the individual flowers are pale green to straw-colored and elliptical in shape. They are bluntly rounded, hence the German name. The fruit capsule is slightly longer than the bloom, triangular-egg-shaped and laterally compressed. She wears a short top. The seeds are red-brown and have a reticulate pattern.

The flowering period extends from June to July.

The number of chromosomes is 2n = 40.

Distribution and location

The dull-flowered bulrush is widespread in Europe, with the exception of Scandinavia, as well as in North Africa and parts of Asia Minor as far as Iraq. Neophytic occurrences exist in New Zealand and on the east coast of North America.

It grows in wet meadows (Calthion palustris Tüxen 1937), intermediate bog meadows (Caricion davallianae Klika 1934) and in ditches on wet, well-ventilated, more or less nutrient-rich, mostly calcareous, often salty, humus or humus-rich calcareous soils . It occurs in Central Europe in societies of the Calthion association, especially in the Juncetum subnodulosi, but also in societies of the Caricion davallianae and Magnocaricion associations.

literature

  • Jürke Grau , Bruno P. Kremer, Bodo M. Möseler, Gerhard Rambold, Dagmar Triebel: Grasses. Sweet grasses, sour grasses, rushes and grass-like families in Europe (=  Steinbach's natural guide ). New, edit. Special edition edition. Mosaik, Munich 1996, ISBN 3-576-10702-9 .
  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Ed .: Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). Eugen Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3364-4 .
  • Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 7th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1994, ISBN 3-8252-1828-7 .

Individual evidence

  1. ↑ a b 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.  149 .
  2. ^ Rafaël Govaerts (ed.): Juncus subnodulosus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved October 12, 2016.

Web links

Commons : obtuse bulrush  - album of pictures, videos and audio files