Acker Speedwell
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Field speedwell ( veronica agrestis ) |
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| Veronica agrestis | ||||||||||||
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The field speedwell ( Veronica agrestis ) is a species of plant in the plantain family (Plantaginaceae).
description
Vegetative characteristics
The field speedwell is an annual herbaceous plant that usually reaches heights of 10 to 25 centimeters. The non-rooting stem grows prostrate or ascending, is strong and usually branched at the bottom.
The leaves are short stalked. The simple, slightly shiny leaf blade is ovate-elliptical and bluntly notched to serrate. The upper leaves are also wedge-shaped and light green in color.
Generative characteristics
The field speedwell blooms mainly in the months of March to June and often again from August to October. It forms racemose inflorescences . The calyx lobes are lanceolate, rounded at the front and sometimes hairy glands. They don't overlap. The 5 to 8 millimeter long corollas are whitish and veined blue; occasionally a corolla lobe is colored light blue or reddish.
The somewhat flattened, kidney-shaped capsule fruit is clearly keeled, deeply edged and has a very pointed bay. Only glandular hairs are found on their surface, shorter, glandeless hairs are missing. The stylus has a maximum length of 1.2 millimeters and usually does not protrude beyond the capsule bay.
The number of chromosomes is 2n = 28.
ecology
The Acker-Ehrenpreis is a hygromorphic, mesomorphic therophyte . The Acker-Ehrenpreis is a dark germ .
Occurrence
Veronica agrestis is widespread from southern Scandinavia to western and southern Europe. It can be found in North Africa , the Canaries and Madeira and penetrates east to Russia . Furthermore, Veronica agrestis is a neophyte in North America . The species is mostly found in Central Europe.
In Germany the Acker-Ehrenpreis is widespread, only in Bavaria does it appear rather scattered. In Austria the field speedwell is found scattered or rarely in mountainous to mountainous altitudes . Veronica agrestis can be found scattered throughout Switzerland .
The field speedwell grows in root crop weed communities and in gardens. It prefers more or less fresh, nutrient-rich and often sandy loam soils . He is in Central Europe, a characteristic species of Soncho-Veronicetum agrestis from the Association Fumario-Euphrorbion.
literature
- 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 .
- Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria . Ed .: Manfred A. Fischer. Eugen Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
- Christian Heitz: School and excursion flora for Switzerland. Taking into account the border areas. Identification book for wild growing vascular plants . Founded by August Binz. 18th completely revised and expanded edition. Schwabe & Co., Basel 1986, ISBN 3-7965-0832-4 .
- Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 6th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1990, ISBN 3-8001-3454-3 .
Individual evidence
- ↑ a b Veronica agrestis L., Acker-Ehrenpreis. In: FloraWeb.de.
- ↑ 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. 841 .
- ↑ Veronica on the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved December 18, 2017.
Web links
- Acker Speedwell . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Veronica agrestis L. In: Info Flora , the national data and information center for Swiss flora . Retrieved March 8, 2016.
- Distribution in the northern hemisphere.
- Thomas Meyer: Ehrenpreis data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia ).
