2204.000 Oxygonum
Ronse Decraene, L.-P. & Akeroyd, J.R. (1988) Generic limits in Polygonum and related genera (Polygonaceae) on the basis of floral characters Botanical Journal of the Linnean Society 98 321-371
Description of the genus
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. Worldwide: 30 species in tropical and South Africa and Madagascar Zimbabwe: 8 taxa. |
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Links to taxa: View: living plant images - herbarium specimen images - all images for this genus
| Species | FZ divisions | Content |
| alatum Burch. var. longisquamatum Germish. | N,W,E,S | Image |
| delagoense Kuntze | W,C,S | Description, Image |
| dregeanum Meisn. [Agg] | N,W,C,E,S | Description, Image |
| dregeanum Meisn. subsp. canescens (Sond.) Germish. var. canescens | W,C,E,S | |
| dregeanum Meisn. subsp. canescens (Sond.) Germish. var. dissectum Germish. | C | |
| dregeanum Meisn. subsp. canescens (Sond.) Germish. var. lobophyllum Germish. | E | |
| dregeanum Meisn. subsp. strictum (C.H. Wright) Paiva & S. Ortiz | N,W,C,E,S | |
| sinuatum (Hochst. & Steud. ex Meisn.) Dammer | N,W,C,E,S | Description, Image |
Other sources of information about Oxygonum:
Our websites:
Flora of Botswana: OxygonumFlora of Burundi: Oxygonum
Flora of Caprivi: Oxygonum
Flora of the DRC: Oxygonum
Flora of Malawi: Oxygonum
Flora of Mozambique: Oxygonum
Flora of Rwanda: Oxygonum
Flora of Zambia: Oxygonum
External websites:
African Plants: A Photo Guide (Senckenberg): OxygonumBHL (Biodiversity Heritage Library): Oxygonum
EOL (Encyclopedia of Life): Oxygonum
GBIF (Global Biodiversity Information Facility): Oxygonum
Google: Web - Images - Scholar
iNaturalist: Oxygonum
IPNI (International Plant Names Index): Oxygonum
JSTOR Plant Science: Oxygonum
Mansfeld World Database of Agricultural and Horticultural Crops: Oxygonum
Plants of the World Online: Oxygonum
Tropicos: Oxygonum
Wikipedia: Oxygonum