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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 Zambia: 13 taxa. |
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| Species | FZ divisions | Provinces | Content |
| alatum Burch. var. longisquamatum Germish. | B,S | S,W | Image |
| annuum S. Ortiz & Paiva | B,W | W | |
| buchananii (Dammer) J.B. Gillett | E | E | |
| carnosum R.A. Graham[DD] | N | Lp | |
| delagoense Kuntze | S | S | Description, Image |
| dregeanum Meisn.[Agg] | N,W,C,E,S | Image | |
| dregeanum Meisn. subsp. strictum (C.H. Wright) Paiva & S. Ortiz | B,N,C,S | N,C,Lk,W | |
| fruticosum Dammer ex Milne-Redh. | B,W | Nw,N | |
| litorale R.A. Graham[DD] | N | Lp | |
| pachybasis Milne-Redh. | N,W | Nw,N | Description, Image |
| salicifolium Dammer | S | S | |
| sinuatum (Hochst. & Steud. ex Meisn.) Dammer | B,N,W,C,E,S | Cb,N,E,C,Lk,S,W | Description, Image |
| tenerum Milne-Redh. | W | Nw |
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