Thin-stemmed sandwort

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Thin-stemmed sandwort
Thin-stemmed sandwort (Arenaria leptoclados)

Thin-stemmed sandwort ( Arenaria leptoclados )

Systematics
Nuclear eudicotyledons
Order : Clove-like (Caryophyllales)
Family : Carnation family (Caryophyllaceae)
Subfamily : Alsinoideae
Genre : Sand herbs ( arenaria )
Type : Thin-stemmed sandwort
Scientific name
Arenaria leptoclados
( Rchb. ) Cast.

The Dünnstängelige chickweed ( Arenaria leptoclados ), and Southern Chickweed or Tender Chickweed called, is a plant of the genus arenaria ( Arenaria ) within the family of Caryophyllaceae (Caryophyllaceae).

description

illustration
Seeds

The thin-stemmed sandwort is an annual herbaceous plant that reaches heights of 5 to 15 centimeters. The yellow-green, thin stem is heavily branched. The opposite leaves are ovate.

The flowering period extends from May to September. The inflorescence goes into a monochasial branch. The hermaphroditic flowers are 3 to 5 millimeters in diameter and are radially symmetrical and five-fold with a double flower envelope . The five sepals are ovate, 2 to 3 millimeters long, the skin edge of the inner sepals is as wide as their middle section. The five free, smaller petals are white.

The fruit stalks are usually bent over at the tip. The ripe, soft capsule fruit with a permanent calyx is usually 1.5, rarely up to 1.8 millimeters wide, slightly bulbous at the base, and as long as the sepals. The kidney-shaped and textured, red-brown seeds are 0.4 to 0.5 millimeters long.

The chromosome number of the species is 2n = 20.

ecology

The thin-stemmed sandwort is a therophyte .

The diaspores are the seeds.

Occurrence

The thin-stemmed sandwort is a sub-Mediterranean flora element with a distribution focus in southwest Europe and further north to southern Sweden , Hungary and the Crimea . In North America and Australia it is a neophyte.

The thin-stemmed sandwort populates gappy xerothermal lawns , moderately dry ruderal areas , fields, paths and walls in warmer climates . It is a character species of the order Sedo-Scleranthetalia in Central Europe, but also occurs in gappy societies of the Festuco-Brometea class.

Taxonomy

The thin-stemmed sandweed was created by Heinrich Gottlieb Ludwig Reichenbach in Icon. Fl. Germ. Helv. 5/6: 32, t. 4941. 1841 as Arenaria serpyllifolia var. Leptoclados Rchb. first described. This variety was created by Giovanni Gussone in Fl. Sicul. Syn. 2: 824, raised to a kind in 1845. Synonyms for Arenaria leptoclados (Rchb.) Guss. are Arenaria brevifolia Gilib. , Arenaria gorgonea J.A. Schmidt , Arenaria minutiflora Loscos , Arenaria tenuior (Mertens & WDJ Koch) Gürke , Arenaria serpyllifolia var. Tenuior Mertens & WDJ Koch , Arenaria uralensis Pall. and Arenaria zozii Kleopow .

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 .
  • Eckehart J. Jäger (ed.): Excursion flora from Germany. Vascular plants: baseline . Founded by Werner Rothmaler. 20th, revised and expanded edition. Spektrum Akademischer Verlag, Heidelberg 2011, ISBN 978-3-8274-1606-3 .
  • Oskar Sebald, Siegmund Seybold, Georg Philippi (Hrsg.): The fern and flowering plants of Baden-Württemberg . 2nd, supplemented edition. tape 1 : General Part, Special Part (Pteridophyta, Spermatophyta): Lycopodiaceae to Plumbaginaceae . Eugen Ulmer, Stuttgart (Hohenheim) 1993, ISBN 3-8001-3322-9 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Page 384. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5
  2. ↑ Ronald L. Hartman, Richard K. Rabeler, Frederick H. Utech: Arenaria Linnaeus. In: Flora of North America, vol. 5. online .
  3. ↑ Karol Marhold, 2011: Caryophyllaceae : Data sheet Arenaria leptoclados In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity .

Web links

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