Dillenius' wood sorrel

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Dillenius' wood sorrel
JEPS109354 Oxalis dillenii (5553299277) .jpg

Dillenius' wood sorrel ( Oxalis dillenii )

Systematics
Rosids
Eurosiden I
Order : Wood sorrel (Oxalidales)
Family : Wood sorrel family (Oxalidaceae)
Genre : Wood sorrel ( Oxalis )
Type : Dillenius' wood sorrel
Scientific name
Oxalis dillenii
Jacq.

Dillenius-sorrel ( Oxalis dillenii ) is a plant of the genus sorrel ( Oxalis ) within the family of Oxalidaceae (Oxalidaceae). Originally native to North America , it is a neophyte in many parts of the world .

description

Habit, the fruit stalks are mostly turned back.
The leaflets of the deciduous leaves are bilobed to 17-25% of their length.
The fruits have longer protruding hairs and shorter hairs pointing downwards (to the left in the picture).
The seeds have whitish transverse ribs.

The Dillenius wood sorrel is an annual to perennial herbaceous plant . It forms a taproot . The stem is upright, usually richly branched below, rarely simple and not rooted at the nodes. The internodes are shortened in sections in the upper part of the stem, so that the mostly green, rarely reddish upper leaves are opposite or whorled. Stems, leaves and flower stalks have a gray-green appearance due to the multitude of unicellular, exclusively upward-lying hairs ( trichomes ) (among other things this is where Oxalis dillenii differs from Oxalis stricta ). The stipules are very narrow and fused with the petiole.

The flowering period extends from July to October.

The capsule fruit is usually 15 to 20 (10 to 30) mm long and has numerous, single-celled hairs lying down and a few to numerous protruding, multicellular limb hairs. The brown seeds have clearly recognizable white lines on their transverse ribs.

The number of chromosomes is 2n = 18, 20, 22 or 24.

Occurrence

The Dillenius wood sorrel is originally native to the eastern United States and neighboring Canada .

After Europe , he was probably in the 19th century over the Mediterranean introduced. Today it occurs as a neophyte in Albania, Austria, Great Britain, the former Czechoslovakia, Denmark, France, Italy (with Sardinia) and the former Yugoslavia. In Germany it was first detected in Berlin in 1961 and in Darmstadt in 1962. In Germany, the Dillenius' sorrel can still be found today in addition to Berlin at some locations in Hesse and also in Rhineland-Palatinate and Saarland, as well as in Baden-Württemberg.

The Dillenius sorrel needs nutrient-rich, moderately dry to fresh soil . In the area of ​​origin it can be found in prairies , light oak forests and in weed communities. In Europe one finds it in weed communities, on roadsides, in root crops of the association Polygono-Chenopodion, in cemeteries, in gardens and in gappy park lawns in associations of the association Cynosurion; it rarely grows in fields.

literature

  • Siegmund Seybold : The flora of Germany and the neighboring countries. A book for identifying all wild and frequently cultivated vascular plants . Founded by Otto Schmeil , Jost Fitschen . 95th completely revised and expanded edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01498-2 .
  • Ruprecht Düll , Herfried Kutzelnigg : Pocket dictionary of plants in Germany and neighboring countries. The most common Central European species in portrait . 7th, corrected and enlarged edition. Quelle & Meyer, Wiebelsheim 2011, ISBN 978-3-494-01424-1 .
  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Published by the Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). 2nd corrected and enlarged edition. Eugen Ulmer, Stuttgart (Hohenheim) 2007, ISBN 978-3-8001-4990-2 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi (Hrsg.): The fern and flowering plants of Baden-Württemberg . tape 4 : Special part (Spermatophyta, subclass Rosidae): Haloragaceae to Apiaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1992, ISBN 3-8001-3315-6 .
  • Dillenius' wood sorrel. In: FloraWeb.de.

Individual evidence

  1. ↑ a b c Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 623.

Web links

Commons : Dillenius wood sorrel ( Oxalis dillenii )  - Collection of images, videos and audio files