Krascheninnikovia

Krascheninnikovia lanata

The Horn Report ( Krascheninnikovia ) are a genus of flowering plants in the family Amaranthaceae ( Amaranthaceae ). It is characterized by a dense pubescence of stellate hairs.

• 5.1 Notes and references

Description

Vegetative characteristics

The Horn Sign species are erect subshrubs or shrubs. The plant parts have a dense pubescence of branched stellate hairs and unbranched multicellular hairs ( trichomes ).

The change-constant leaves are available individually or bunched and stalked to nearly sessile. The flat, not fleshy leaf blade is linear - lanceolate to ovate and entire, cuneate at the base, truncate or slightly heart-shaped.

Inflorescences and flowers

Horn Sign species are monoecious ( monoecious ) or dioecious ( dioecious ) getrenntgeschlechtig. The male flowers are entangled to form multiple and discontinuous eared or kopfige inflorescences without bracteoles. Male flowers contain four linked below, ovate to elliptic, membranous, hairy on the back Blütenhüllblätten and four stamens with oblong anthers protruding from the perianth. The female flowers appear singly or in pairs in the leaf axils and are of two dense star- haired Down (Roll Brakteolen ) wrapped, which fuse at the bottom of a tube compressed to be slightly keeled and have four horn-like peaks. Female flowers have no perianth, but contain only a hairy ovary and a short stylus, which ends in two elongated, threadlike scars.

Fruit and seeds

The area enclosed by the Page Down fruit is silky hairy, elliptic to obovate and compressed. The membranous pericarp not adhere to the seeds. The vertical, egg-shaped seed has a brown, membranous, hairy seed coat. The embryo encloses like a horseshoe to semi - ring the abundant endosperm.

Chromosome number

The basic chromosome number is x = 9 In Krascheninnikovia Ceratoides the chromosome number is 2n = 36 In Krascheninnikovia lanata were 2n = 18 and 2n = 36 found.

Ecology

Krascheninnikovia lanata is a food plant for the caterpillars of the moth dwarf Bucculatrix eurotiella.

Occurrence

The Horn Sign species are mainly distributed in Eurasia, only one or two species occur in North America. In Europe, only the Europe - horn alarm ( Krascheninnikovia Ceratoides ) in Eastern Europe and parts of Southern Europe is home. As glacial cold steppe relict rarely occurs in Austria.

System

The genus Krascheninnikovia in 1772 set up by Johann Anton Güldenstädt ( in Novi Commentarii Academiae Scientiarum Imperalis Petropolitanae, 16, p 551). The genus name honors the Russian botanist Krascheninnikovia Stepan Petrovich Krasheninnikov. The type species is Krascheninnikovia Ceratoides (L.) Güldenst.

Synonyms of Krascheninnikovia Güldenst. are Eurotia Adans. ( nom.illegit. ) and Ceratoides Gagnebin ( nom.rej. ). The actually older name Ceratoides was rejected because he quotes only a written description before Linnaeus times of Tournefort, but contains the type of the related genus Ceratocarpus.

The genus belongs to Krascheninnikovia phylogenetic studies on the tribe Axyrideae in the subfamily of the Amaranthaceae family Chenopodioideae.

The genus of the Horn Report ( Krascheninnikovia ) are about three to seven types:

• Krascheninnikovia arborescens ( Losinsk. ) Czerep. It is native to China.
• Europe - horn alarm ( Krascheninnikovia Ceratoides (L.) Güldenst, including Krascheninnikovia lenensis ( Kumin. ) Tzvelev. ): She's from Europe spread to East Asia.
• Krascheninnikovia compacta ( Losinsk. ) Grubov: It occurs in China and Tajikistan.
• Krascheninnikovia eversmanniana ( Stschegl. ex Losinsk. ) Grubov: It comes from Kazakhstan prior to the Chinese province of Xinjiang.
• Krascheninnikovia fruticulosa ( Pazij. ) Czerep. It is common in Asia.
• Krascheninnikovia lanata ( Pursh ) A.Meeuse & A.Smit: It is native to North America.
• Krascheninnikovia pungens ( Popov ) Czerep. It is common in Asia.

Documents

• Noel H. Holmgren: Krascheninnikovia, pp. 307 - Registered as text printed work 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. (Sections description, chromosome number, occurrence)
• Krascheninnikovia - online. In: Helmut Freitag et al. Chenopodiaceae. In: Flora of Pakistan, Volume 204 - Missouri Botanical Garden Press & University of Karachi. (Sections description, occurrence)
• Gelin Zhu, Sergei L. Mosyakin & Steven E. Clemants: Krascheninnikovia, pp. 358 - Registered as text printed work. 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. (Sections Description, occurrence, systematics )