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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, usually (in ours) erect. Ochreae present. Leaves large compared to Polygonum, usually more than 5 cm. Each inflorescence with usually more than 6 flowers, some or all inflorescences terminal, bracts similar to the leaves. Perianth segments mostly 5, petaloid, not enlarging in fruit. Stamens 8 (or 4-7 by reduction). Styles 2-3; nut biconvex or 3-angled. Worldwide: c. 150 species, ± cosmopolitan Malawi: 12 taxa. The larvae of the following species of insect eat species of this genus:
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| Species | FZ divisions | Content |
| barbata (L.) H. Hara | N,S | |
| capitata (Buch.-Ham. ex D. Don) H. Gross | S | Description, Image |
| decipiens (R. Br.) K.L. Wilson | N,C,S | Description, Image |
| glomerata (Dammer) S. Ortiz & Paiva | N,C,S | |
| lapathifolia (L.) Gray | C,S | Description |
| limbata (Meisn.) H. Hara | C,S | Description, Image |
| madagascariensis (Meisn.) S. Ortiz & Paiva | N,C,S | Description, Image |
| nepalensis (Meisn.) H. Gross | N,C,S | Description, Image |
| senegalensis (Meisn.) Soják | N,C,S | Description, Image |
| senegalensis f. albotomentosa (R.A. Graham) K.L. Wilson | N,C,S | Description, Image |
| setosula (A. Rich.) K.L. Wilson | N,C,S | |
| strigosa (R. Br.) H. Gross | N,C,S | Description, Image |
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