Oxygonum és un gènere de plantes amb flors dins la família poligonàcia. Consta de 16 espècies.[1]
Aquest gènere va ser descrit per Burch. ex Campd. i pulicat a Monographie des Rumex 18. 1819.[2] L'espècie tipus és: Oxygonum alatum Burch.
Oxygonum és un gènere de plantes amb flors dins la família poligonàcia. Consta de 16 espècies.
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]
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]
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]
PolygonoideaeOxygoneae (Oxygonum)
Persicarieae
Fagopyreae
Pteroxygoneae
Calligoneae
Rumiceae
Polygoneae
As of March 2019, Plants of the World Online accepted the following species:[1]
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.
Oxygonum es un género de plantas de la familia Polygonaceae. Comprende 55 especies descritas y de estas, solo 16 aceptadas.[1]
El género fue descrito por Burch. ex Campd. y publicado en Monographie des Rumex 18. 1819. [2] La especie tipo es: Oxygonum alatum Burch.
A continuación se brinda un listado de las especies del género Oxygonum aceptadas hasta mayo de 2014, ordenadas alfabéticamente. Para cada una se indica el nombre binomial seguido del autor, abreviado según las convenciones y usos.
Oxygonum es un género de plantas de la familia Polygonaceae. Comprende 55 especies descritas y de estas, solo 16 aceptadas.
Oxygonum é um género botânico pertencente à família Polygonaceae[1].
Oxygonum é um género botânico pertencente à família Polygonaceae.
«Oxygonum — World Flora Online». www.worldfloraonline.org. Consultado em 19 de agosto de 2020
