Piedmont ragweed
| Piedmont ragweed | ||||||||||||
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Cruciata pedemontana |
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| Cruciata pedemontana | ||||||||||||
| ( Bellardi ) Honorable. |
The Piedmont ragweed ( Cruciata pedemontana ), also called Piedmontese ragweed , is a species of the genus cruciform herbs ( Cruciata ) within the red family (Rubiaceae).
description
Vegetative characteristics
The Piedmont cruciferous herb is an annual herbaceous plant that usually reaches heights of 10 to 35 centimeters. The stem and the leaves are hairy more or less densely. The ganzrandigen leaves are apparently in fourfold whorls arranged, but actually against the time and the side leaves the Laubblattspreiten conformed. The middle leaves are 0.4 to 1 centimeter long and have a distinct central longitudinal nerve and two to four indistinct lateral longitudinal nerves.
Generative characteristics
The flowering period of the Piedmont cabbage leaves in Central Europe from April to May. The pendant, seated in the Laubblattquirlen part inflorescences are shorter than their bract and without bracts . The stalked flowers are radially symmetrical and hermaphroditic. The cup is indistinct or absent. The pale yellow-green crown measures 0.5 to 1 mm in diameter and has four, sometimes three or five lobes that are longer than the corolla tube. In a flower there are four stamens and a subordinate, double ovary with two pistils .
The fruit is a dry, leathery split fruit . The fruit stalks are strongly curved downwards.
The number of chromosomes is 2n = 18.
ecology
The Piedmont ragweed is a therophyte that survives the unfavorable season as a seed in the soil.
distribution
The distribution area of the Piedmont ragweed covers Europe to West and Central Asia and Morocco . Cruciata pedemontana has a main sub-Mediterranean distribution area and occurs mainly in the countries north of the Mediterranean . In German-speaking countries , the Piedmont-crosswort is only in Austria , South Tyrol and in Switzerland indigenous .
In Austria, the Piedmont ragweed occurs only in the Pannonian area in the federal states of Vienna , Lower Austria and Burgenland, rarely on gappy dry grassland , sandy embankments and shrubbery in the collines up to possibly submontane heights . This species is considered endangered in Austria.
Systematics
It was first published in 1788 under the name ( Basionym ) Valantia pedemontana by Carlo Antonio Lodovico Bellardi . Honoring the new combination to Cruciata pedemontana (Bellardi). was published in 1958 by Friedrich Ehrendorfer in Notes from the Royal Botanic Garden Edinburgh , Volume 22, p. 396. Other synonyms for Cruciata pedemontana (Bellardi) Ehrend. are: Galium pedemontanum (Bellardi) All. , Galium retrorsum DC.
In the tribe Rubieae, the closest related genera of Cruciata are Valantia and Galium , to which the woodruff ( Galium odoratum ) also belongs.
Individual evidence
- ↑ a b c d e f Manfred A. Fischer, Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol . 3rd, improved edition. Province of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 , p. 721 .
- ^ Konrad Lauber, Gerhart Wagner: Flora Helvetica. Flora of Switzerland. Verlag Paul Haupt, Bern, Stuttgart, Vienna, 1996, ISBN 3-258-05405-3 , p. 1014.
- ↑ Rafaël Govaerts (Ed.): Cruciata pedemontana. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved January 31, 2016.
- ↑ a b data sheet at The Euro + Med PlantBase - the information resource for Euro-Mediterranean plant diversity , accessed on December 31, 2014
Web links
- Cruciata pedemontana (Bellardi) Honoring. In: Info Flora , the national data and information center for Swiss flora . Retrieved January 30, 2016.