Mackinder, B. et al. (2001) Papilionoideae Flora Zambesiaca 3(5)
Erect, rarely prostrate or climbing, herbs or subshrubs. Stipules present. Leaves 1- or 3-foliolate; leaflets often with small glands beneath. Flowers reflexed. Calyx 5-lobed, lobes equal or unequal, the upper free or sometimes partly fused. Corolla basically yellow. Ovary 2-ovulate. Pods up to 2 × as long as broad, oblong or elliptic, flattened, covered with long hairs or glabrescent. Seeds 2, ovoid or oblong; funicle inserted at one end of the linear hilum. Worldwide: 130 species in tropical and warm areas Rwanda: 12 taxa. Insects associated with this genus:
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| Species | Content | |
| chrysadenium Taub. var. chrysadenium | Description, Image | |
| cordifolium Hochst. ex A.Rich. | ||
| erici-rosenii R.E.Fr. [Agg] | ||
| montanum Baker f. | Description, Image | |
| nutans Schinz | ||
| parviflorum E. Mey. subsp. parviflorum | ||
| pauciflorum Klotzsch | Description, Image | |
| pentaphyllum Harms | ||
| psoraleoides (Lam.) G. Don | Description, Image | |
| rhodesicum R.E. Fr. | ||
| scioanum Avetta subsp. lejeunei (Staner & De Craene) Verdc. | ||
| shirense Baker f. [Agg] |