Description
(
Inglês
)
fornecido por Flora of Zimbabwe
Annual or perennial herbs,
rarely shrubs. Ochreae present. Flowers polygamous and heterostylous, borne in
axillary elongated racemes. Male flowers with a very short tube and
4-5 petaloid perianth segments. Bisexual flowers tubular; perianth segments
persistent, the tube accrescent in fruit. Pedicels of
bisexual flowers lengthening and thickening, those of the male flowers
withering. Stamens 8, in 2 series, 5 outer and 3 inner. Styles 3.
Fruiting perianth unarmed or with 3 prickles, sometimes
winged.
- licença
- cc-by-nc
- direitos autorais
- Mark Hyde, Bart Wursten and Petra Ballings
- citação bibliográfica
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Oxygonum Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/genus.php?genus_id=518
- autor
- Mark Hyde
- autor
- Bart Wursten
- autor
- Petra Ballings
Oxygonum
(
Inglês
)
fornecido por wikipedia EN
Oxygonum is a genus of plants in the family Polygonaceae with about 30 species. It is native to eastern parts of Africa and to the Arabian Peninsula.[1]
Description
Species of Oxygonum are annual or perennial herbaceous plants, more rarely shrubs or shrubby. Their leaves are variable between and within species. The inflorescences are long narrow racemes with bundles (fascicles) of flowers, usually one to five, but sometimes up to 15. The flowers are polygamous (i.e. there are male, female and bisexual flowers on the same plant). There are usually five tepals, arranged spirally, fused at the base to form a tube, longer in female flowers than in male ones. The eight stamens are joined at the base, with patches of nectar-bearing tissue at the base of the inner whorl. The fruit is in the form of an achene, usually three-angled, often with rows of spinelike structures.[2]
Taxonomy
The genus Oxygonum was first published in 1819 by Francisco Campderá, who attributed the name to William John Burchell.[1][3] Oxygonum is placed in the tribe Oxygoneae of the subfamily Polygonoideae; it is the only genus in the tribe. A 2015 molecular phylogenetic study suggested that it was the sister of all the remaining tribes.[2]
Polygonoideae Oxygoneae (Oxygonum)
Persicarieae
Fagopyreae
Pteroxygoneae
Calligoneae
Rumiceae
Polygoneae
Species
As of March 2019, Plants of the World Online accepted the following species:[1]
References
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^ a b c d "Oxygonum Burch.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-03-08
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^ a b Schuster, Tanja M.; Reveal, James L.; Bayly, Michael J. & Kron, Kathleen A. (2015), "An updated molecular phylogeny of Polygonoideae (Polygonaceae): Relationships of Oxygonum, Pteroxygonum, and Rumex, and a new circumscription of Koenigia", Taxon, 64 (6): 1188–1208, doi:10.12705/646.5
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^ Campderá, Francisco (1819), "Genarum Polygonaearum Clavis Dichotomica", Monographie des Rumex, Paris: Treuttel & Würtz, retrieved 2019-03-08
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia authors and editors
Oxygonum: Brief Summary
(
Inglês
)
fornecido por wikipedia EN
Oxygonum is a genus of plants in the family Polygonaceae with about 30 species. It is native to eastern parts of Africa and to the Arabian Peninsula.
- licença
- cc-by-sa-3.0
- direitos autorais
- Wikipedia authors and editors
