Oxybasis glauca

Grey Green goosefoot ( Oxybasis glauca )

The Grey-green pigweed ( Oxybasis glauca, Chenopodium glaucum syn ) is a species of the subfamily Chenopodioideae in the family of Amaranthaceae ( Amaranthaceae ). It is found in Europe, Asia and North America.

• 5.1 Notes and references

Features

Vegetative characteristics

The Grey-green goosefoot is an annual herbaceous plant, reaching heights of growth of mostly 20 to 40 cm, rarely up to 120 cm, but usually it grows characteristic low-lying and only a few centimeters high. The usually creeping stem is green to purple and ribbed.

The change-constant leaves are divided into petiole and leaf blade. The petiole is 5 to 10 mm long. Often fleshy thickened lamina has a length of 2-4 cm and a width of 0.6 to 2 cm. The upper leaf surface is bare and dark gray-green, the lower leaf surface is heavily white gray mealy. The leaf margins are sinuate dentate to lobed. The projected median nerve is yellow - green.

Generative features

The total composite inflorescences consist of knäueligen part inflorescences. There are hermaphrodite and female flowers available. The light green perianth is three to fünfzipfelig. The one or two stamens do not protrude beyond the perianth and possess spherical dust bag. The two scars are very short.

The membranous pericarp ( pericarp ) is yellow - white. The dark brown or reddish-brown, flattened spherical seeds have a diameter of about 0.75 mm. The seed coat is finely pitted dots to netzadrig.

The chromosome number is 2n = 18, in some studies also 2n = 36 were found.

Ecology

The Grey-green pigweed is a food plant for the caterpillars of Goosefoot Pug ( Eupithecia sinuosaria ) and Log - blade tensioner ( Pelurga comitata ).

Distribution and habitat requirements

The Grey-green pigweed is eurasia table - continental spread. It occurs in many parts of Europe, in the temperate zones of Asia to East Asia and North America.

In Germany it is growing, especially in summer trained, dominated by annuals goosefoot - shore communities ( Chenopodion rubri ). Furthermore, it is less often thrives in young stages (initial stage) of nitrogen-rich ruderal and weed communities ( Polygono - Chenopodietalia ) of the root crop fields and gardens, especially in rural settlements, on dung heaps, gutters, ditches, walls and waste places. As salt -enduring kind he is occasionally also found in halophytes hallways.

System

Oxybasis glauca (L.) P. Fuentes, Uotila & Borsch belongs to the tribe Atripliceae in the subfamily within the family Amaranthaceae Chenopodioideae.

The first description as Chenopodium glaucum was made in 1753 by Carl Linnaeus in Species Plantarum. Through molecular genetic studies turned out that the type is not one of Chenopodium in the strict sense. Therefore, it was provided by Suzy Fuentes - Bazan, Pertti Uotila and Thomas Borsch in the genus Oxybasis 2012 ( in Willdenowia 42, 2012, p 15 ).

Synonyms for Oxybasis glauca (L.) P. Fuentes, Uotila & Borsch, based on the same type specimen, Chenopodium glaucum L., Agathophytum glaucum (L. ) Foot, Atriplex glauca (L.) Crantz are (nom. illeg. ) blitum glaucum (L.) WDJ Koch, Botrys glauca (L.) Nieuwl. , Chenopodium glaucum subsp. euglaucum (L.) Aellen ( nom inval. ) and Orthospermum glaucum (L.) Opiz. As more synonyms Chenopodium apply ambiguum R.Br., Chenopodium ambiguum var majus Moq. , Chenopodium ambiguum var minus Moq. , Chenopodium glaucum var ambiguum ( R.Br. ) Hook.f., Chenopodium glaucum subsp. ambiguum ( R.Br. ) Murr & Thell. , Chenopodium glaucum var divaricatum Hook.f., Chenopodium glaucum var divaricatum Moq. , Chenopodium glaucum var littorale Rodway, Chenopodium glaucum subsp. marlothianum Thell. & Aellen, Chenopodium glaucum f minus ( Moq. ) Aellen, Chenopodium littorale Moq. (nom. illeg. ), Chenopodium nudiflorum F.Muell. ex Murr, Chenopodium pallidum Moq. , Chenopodium wolffii Simonk. and Orthosporum glaucum Peterm. There have been described several subspecies or varieties, this will be discussed differently by authors.

Swell

• Gelin Zhu, Sergei L. Mosyakin, Steven E. Clemants: Chenopodiaceae. In: Wu Zhengyi, Peter H. Raven, Deyuan Hong (eds.): Flora of China. Volume 5: Ulmaceae through Basellaceae, Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 2003, ISBN 1-930723-27- X, pp. 379, Chenopodium glaucum - online. (Section Description and systematics)
• Steven E. Clemants, Sergei L. Mosyakin: Chenopodium. In: Flora of North America Editorial Committee ( eds.): Flora of North America North of Mexico. Volume 4: Magnoliophyta: Caryophyllidae, part 1, Oxford University Press, New York / Oxford et al 2003, ISBN 0-19-517389-9, p 283, Chenopodium glaucum - online. (Section Description and systematics)
• Grey Green goosefoot. In: FloraWeb.de.
• Werner Roth painter ( Lim. ), Rudolf Schubert, Walter Vent (ed.): Excursion Flora of Germany. Volume 4: Critical band. 8th edition. Volk und Wissen, Berlin, 1990, ISBN 3-06-012526-0.