Red Goosefoot ( Oxybasis rubra)
Oxybasis is a plant genus of the subfamily Chenopodioideae in the family of Amaranthaceae ( Amaranthaceae ). It was erected in 1841, but newly circumscribed until 2012. It comprises five species that previously to the goose feet ( Chenopodium ) were counted. These are widespread in Europe, Asia, North Africa and America.
Oxybasis species are annual herbaceous plants without aromatic fragrance. The branched stems grow upright, ascending or spreading, the lowest side branches are sometimes almost opposite sides.
The alternate, stalked leaves are more or less glabrous, sometimes floured tight on the bottom. Your pudgy, slightly fleshy leaf blade may be triangular, narrow - triangular, pike -shaped, rhombischoder lanceolate. The leaf margin is smooth or serrated.
The flowers are in compact, knäueligen partial inflorescences, to sham- aged men who, rarely paniculate, axillary or terminal inflorescences are arranged. There are two types of flowers: The flowers at the end of the coil are hermaphroditic, with three to five bloom cladding, which are unconnected for the most part. They have a (up to five) stamens and a superior ovaries with two ( or three ) scars. The lateral flowers are, however, almost always purely female, with three ( or four ) different strongly connected bloom cladding and two scars.
The membranous pericarp is free or only loosely adheres to the seed coat. The seeds of the terminal flower is oriented horizontally in the lateral flowers, it can be vertical or horizontal. Its shape is oval to spherical in shape with a rounded edge. The brownish or black seed coat can be almost smooth or may have a fine mesh pattern or tiny pits.
Systematics and distribution
The genus Chenopodium Oxybasis as Fuentes - Bazan et al. Assigned to (2012 ) the tribe Atriplicieae. It belongs to the subfamily within the family Amaranthaceae Chenopodioideae.
The first description of the genus Oxybasis was made in 1841 by Grigori Silych Karelin and Ivan Petrovich Kirilov (In: enumeration plantarum anno 1840 in regionibus altaicis et confinibus Collectarum In: . Bulletin de la Societe Imperiale des Naturalistes de Moscou 14: p 738-739 ). The genus contained at that time the only way Oxybasis minutiflora Kar & Kir. , Which came to be seen as identical with Chenopodium chenopodioides.
After molecular genetic studies parted Suzy Fuentes - Bazan, Pertti Uotila and Thomas Borsch 2012, the species group to Chenopodium rubrum from the genus Chenopodium from and placed them in the genus Oxybasis, as this is the oldest genus name for this group.
Synonyms for Oxybasis Kar & Kir. are Chenopodium subg. Pseudoblitum sizes. & Godr. , Blitum subg. Pseudoblitum ( Gren. & Godr. ) Schur, Chenopodium sect. Pseudoblitum ( Gren. & Godr. ) Syme, Chenopodium subsect [ unranked ] Rubra Standlschmaus. , Chenopodium [ unranked ] Glauca Standlschmaus. , Chenopodium. Glauca ( Standl. ) A. J. Scott, Chenopodium sect. Glauca ( Standl. ) Ignatov, Chenopodium sect [ unranked ] Urbica Standlschmaus. , Chenopodium. Urbica ( Standl. ) Mosyakin, and Chenopodium sect. Degenia Aellen.
The genus Oxybasis is widespread in Europe, Asia, North Africa, North America and South America. It comprises by Fuentes - Bazan et al. (2012 ) five types:
- Dickblättriger goosefoot ( Oxybasis chenopodioides (L.) P. Fuentes, Uotila & Borsch, Syn Chenopodium chenopodioides (L.) Aellen ): It is found in Europe, North Africa and Asia, as well as introduced species in North and South America.
- Grey Green goosefoot ( Oxybasis glauca (L.) P. Fuentes, Uotila & Borsch, Chenopodium glaucum L. Syn ): It is found in Europe, Asia and North America.
- Oxybasis macrosperma ( Hook. f ) S. Fuentes, Uotila & Borsch, (syn. Chenopodium macrospermum Hook f. ): The species is widespread in South America and the Falkland Islands.
- Red Goosefoot ( Oxybasis rubra (L.) P. Fuentes, Uotila & Borsch, Chenopodium rubrum L. Syn ): He is in Europe, the temperate regions of Asia and North America spread introduced in other areas.
- Road goosefoot ( Oxybasis urbica (L.) P. Fuentes, Uotila & Borsch, Syn Chenopodium urbicum L.): It is found in Europe and Asia, introduced in North America.
- Susy Fuentes - Bazan, Pertti Uotila, Thomas Borsch: A novel phylogeny - based generic classification for Chenopodium sensu lato, and a tribal rearrangement of Chenopodioideae ( Chenopodiaceae ). In: Willdenowia 42, 2012, pp. 15-16. online