Sand evening primrose

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Sand evening primrose
Dune evening primrose 1.JPG

Sand evening primrose ( Oenothera oakesiana )

Systematics
Order : Myrtle-like (Myrtales)
Family : Evening primrose family (Onagraceae)
Subfamily : Onagroideae
Tribe : Onagreae
Genre : Evening primrose ( Oenothera )
Type : Sand evening primrose
Scientific name
Oenothera oakesiana
( A.Gray ) JWRobbins ex S.Watson & JMCoult.

The sand evening primrose ( Oenothera oakesiana ), also called Oake's evening primrose or coastal evening primrose , is a species of the evening primrose genus ( Oenothera ) within the evening primrose family (Onagraceae). In Central Europe it is a neophyte from North America.

description

A leaf rosette is formed in the first year .
illustration

The sand evening primrose is a biennial herbaceous plant that reaches heights of 0.5 to 1.5 meters. A leaf rosette is formed in the first year . The stem is covered with protruding hairs ( indument ) and spotted red. The leaves are light green, lanceolate and somewhat indented in the lower half on the edge.

The flowering period extends from June to September. The apex of the inflorescence is slightly nodding before opening. The flower buds are first green, then reddish. The hermaphrodite flowers are radial symmetry and four-fold with a double flower envelope . The four sepals are covered with protruding hairs ( trichomes ). The calyx lobes are 2 to 3 mm long. The four petals are 16 mm long and just as wide. The ovary is covered with protruding glandular hairs.

The capsule fruit is 25 to 35 mm long, closely covered with hair and has blunt fruit teeth.

The number of chromosomes is 2n = 14.

Occurrence

This article or paragraph presents the situation in Germany . Help us to describe the situation in other countries.

The sand evening primrose in Germany seldom occurs in southern Baden , southern Hesse and in Saxony-Anhalt . In Central Europe , it settles on embankments , sand fields and ruderal sites .

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 .
  • 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 .
  • 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 .

Individual evidence

  1. ^ 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.  689 .

Web links

Commons : Sand Evening Primrose ( Oenothera oakesiana )  - Collection of images, videos and audio files