Biology:Bidens cernua
| Bidens cernua | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Bidens |
| Species: | B. cernua
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| Binomial name | |
| Bidens cernua | |
| Synonyms[1][2][3] | |
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Bidens cernua is a species of flowering plant in the aster family, Asteraceae.[4][5][6][7] It is commonly called nodding beggarticks[8] or nodding bur-marigold. Bidens cernua is distributed throughout much of Eurasia and North America.[4][5][6][7][9] thumb thumb
Description
Bidens cernua is an annual species growing roughly 1m tall, with a fibrous root. Stems are rigid and often either simple or beached. Stem leaves are simple, unstalked, and opposite with saw-toothed to almost smooth margins.[10]
It has yellow flowers with 6-8 ray narrowly lance shaped petals around a central disk. The hemispheric heads are solitary at the ends of branches and nod with age.[10]
The achenes are narrowly wedge-shaped and 4-sided, flattened and ribbed. The pappus has 3-4 barbed bristles.[10]
Distribution and abundance
Bidens cernua is distributed throughout much of Eurasia and North America.[4][5][7][6]
References
- ↑ "The Plant List: A Working List of All Plant Species". http://www.theplantlist.org/tpl/record/gcc-103570.
- ↑ "IPNI entry for Coreopsis ridens". http://www.ipni.org/ipni/advPlantNameSearch.do?find_family=&find_genus=coreopsis&find_species=ridens&find_infrafamily=&find_infragenus=&find_infraspecies=&find_authorAbbrev=&find_includePublicationAuthors=on&find_includePublicationAuthors=off&find_includeBasionymAuthors=on&find_includeBasionymAuthors=off&find_publicationTitle=&find_isAPNIRecord=on&find_isAPNIRecord=false&find_isGCIRecord=on&find_isGCIRecord=false&find_isIKRecord=on&find_isIKRecord=false&find_rankToReturn=all&output_format=normal&find_sortByFamily=on&find_sortByFamily=off&query_type=by_query&back_page=plantsearch.
- ↑ "IPNI entry for Bidens venosa". http://www.ipni.org/ipni/advPlantNameSearch.do?find_family=&find_genus=bidens&find_species=venosa&find_infrafamily=&find_infragenus=&find_infraspecies=&find_authorAbbrev=&find_includePublicationAuthors=on&find_includePublicationAuthors=off&find_includeBasionymAuthors=on&find_includeBasionymAuthors=off&find_publicationTitle=&find_isAPNIRecord=on&find_isAPNIRecord=false&find_isGCIRecord=on&find_isGCIRecord=false&find_isIKRecord=on&find_isIKRecord=false&find_rankToReturn=all&output_format=normal&find_sortByFamily=on&find_sortByFamily=off&query_type=by_query&back_page=plantsearch.
- ↑ 4.0 4.1 4.2 Flora of North America, Bidens cernua Linnaeus, Sp. Pl. 2: 832. 1753.
- ↑ 5.0 5.1 5.2 Flora of China, 柳叶鬼针草 liu ye gui zhen cao, Bidens cernua Linnaeus, Sp. Pl. 2: 832. 1753
- ↑ 6.0 6.1 6.2 Biota of North America Program 2014 county distribution map
- ↑ 7.0 7.1 7.2 Altervista Flora Italiana, Forbicina intera, Bidens cernua L. includes photos and European distribution map
- ↑ Voss, E.G. (1996). Michigan Flora: A guide to the identification and occurrence of the native and naturalized seed-plants of the state. Part III: Dicots (Pyrolaceae–Compositae). Bulletin 61. Ann Arbor, Michigan, U.S.A.: Cranbrook Institute of Science and University of Michigan Herbarium.
- ↑ (xls) BSBI List 2007, Botanical Society of Britain and Ireland, https://bsbi.org/download/3542/, retrieved 2014-10-17
- ↑ 10.0 10.1 10.2 Pojar, Jim; MacKinnon, Andrew (2004). Plants of the Pacific northwest coast: Washington, Oregon, British Columbia & Alaska (Revised ed.). Vancouver: Lone Pine. ISBN 978-1-55105-530-5.
Wikidata ☰ Q27501 entry
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