Chenopodiastrum
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Bastard goosefoot ( Chenopodiastrum hybridum ) |
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| S. Fuentes , Uotila & Borsch |
Chenopodiastrum is a genus of plants from the subfamily Chenopodioideae in the foxtail family(Amaranthaceae)described in 2012. The six species occur in Eurasia , Africa and North America .
description
Chenopodiastrum species are annual herbaceous plants with no aromatic fragrance. Young plants have bladder hairs, which later collapse completely and are shed, so that the plants bald. The stems grow upright and are branched.
The alternate leaves are divided into a petiole and a leaf blade. The thick leaf blades can be triangular, egg-shaped, or rhombic-egg-shaped to lanceolate. The leaf margin is irregularly serrated, lobed or pinnate with narrow serrated lobes.
The flowers are located in small, tightly knotted partial inflorescences, which are arranged in pseudo-eared or racemose inflorescences . These are in the leaf axils or at the end. The hermaphrodite or all-female flowers have five connected at the base bloom with a strong, visible from inside midrib and a sharp keel on top. A circle of five stamens is present in hermaphrodite flowers . The carpels are fused into an upper ovary with two scars.
At the time of fruiting, the flower cover can enclose or spread the fruit. The membranous pericarp adheres firmly to the seed coat. The horizontally oriented seed is lenticular, with a sharp or blunt edge. The black seed coat is often clearly pitted or wrinkled, rarely almost smooth.
Systematics and distribution
The genus chenopodiastrum was 2012 by Suzy Fuentes-Bazan , Pertti Uotila and Thomas Borsch (in A novel phylogeny-based generic classification for Chenopodium sensu lato, and a tribal rearrangement of chenopodioideae (Chenopodiaceae). In Willdenowia 42, p 14) newly described . In this way, several species previously assigned to Chenopodium were separated which, according to molecular genetic studies, do not belong to this genus in the narrower sense.
Chenopodiastrum was described by Fuentes et al. like Chenopodium grouped in the Atripliceae tribe and belongs to the subfamily Chenopodioideae within the family of Amaranthaceae s. l.
The genus Chenopodiastrum is common in Europe , Asia , Africa and North America .
According to Fuentes-Bazan (2012) and Mosyakin (2013), the genus comprises six species in two sections:
- Section Chenopodiastrum sect. Chenopodiastrum ( Synonym : Chenopodium subsect. Undata
Aellen & Iljin ex Mosyakin & Clemants ):
- Chenopodiastrum coronopus (Moq.) S.Fuentes, Uotila & Borsch (Syn .: Chenopodium coronopus Moq. ): It is endemic to the Canary Islands , the Ilhas Selvagens and possibly to Madeira .
- Chenopodiastrum fasciculosum ( Aellen ) Mosyakin (Syn .: Chenopodium fasciculosum Aellen ): It occurs in tropical Africa.
- Wall goose foot ( Chenopodiastrum murale (L.) S. Fuentes, Uotila & Borsch Syn .: Chenopodium murale L. ): It occurs in Europe, North Africa and Southwest Asia .
- Section Chenopodiastrum sect. Grossefoveata ( Mosyakin ) Mosyakin (Syn .: Chenopodium sect. Grossefoveata Mosyakin , Chenopodium [unranked] Hybrida Standl. , Chenopodium sect. Chenopodia C.A.Mey. Ser. Grossefoveata Aellen & Iljin , Chenopodium sect. Chenopodium subsect. Grossefoveata Aellen )
- Chenopodiastrum badachschanicum (Tzvelev) S.Fuentes, Uotila & Borsch (Syn .: Chenopodium badachschanicum Tzvelev ): It occurs in Central Asia , People's Republic of China , in northeast Afghanistan , northern Pakistan , northern India and Nepal .
- Bastard goosefoot ( Chenopodiastrum hybridum (L.) S. Fuentes, Uotila & Borsch Syn .: Chenopodium hybridum L. ): It occurs in Europe, India and in Asia in the temperate climate zone as far as China.
- Chenopodiastrum simplex (Torrey) S.Fuentes, Uotila & Borsch (Syn .: Chenopodium simplex (Torrey) Raf. ): It is native to North America.
swell
- 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, p. 14. DOI: 10.3372 / wi.42.42101
Individual evidence
- ↑ a b c d Chenopodiastrum in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved July 3, 2013.
- ↑ a b Chenopodium fasciculosum in African Plant Database , 2012 Conservatoire et Jardin botaniques & South African National Biodiversity Institute.
- ↑ Sergei L. Mosyakin: New nomenclatural combinations in Blitum, Oxybasis, Chenopodiastrum , and Lipandra (Chenopodiaceae) . In: Phytoneuron 2013-56: S. 6, 2013.
- ↑ Pertti Uotila, 2011: Chenopodiaceae (pro parte majore): Chenopodium coronopus - In: Euro + Med Plantbase - the information resource for Euro-Mediterranean plant diversity , accessed July 2, 2013
- ↑ Chenopodium badachschanicum In: Helmut Freitag et al .: Chenopodiaceae . In: Flora of Pakistan , Volume 204 - Missouri Botanical Garden Press & University of Karachi.
