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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
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 Botswana: 7 taxa. |
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| Species | FZ divisions | Content |
| alatum Burch. var. longisquamatum Germish. | N,SW,SE | Image |
| alatum Burch. var. alatum | N,SW | |
| delagoense Kuntze | N,SW,SE | Description, Image |
| dregeanum Meisn.[Agg] | N,SE | Description, Image |
| dregeanum Meisn. subsp. canescens (Sond.) Germish. var. canescens | N | |
| dregeanum Meisn. subsp. lanceolatum Germish. | SE | |
| sinuatum (Hochst. & Steud. ex Meisn.) Dammer | N,SE | Description, Image |
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