Erect or scrambling or twining, monoecious (rarely dioecious) perennial herbs or shrubs, with stinging hairs. Leaves alternate, stipulate, often cordate. Flowers in racemes, usually mostly male with 1-2 females at the base. Bracts conspicuous, persistent. Petals 0. Male flowers with 3 sepals and 3 stamens. Female flowers with 3 or 6 pinnate or palmate sepals, becoming enlarged in fruit. Ovary 3-locular. Derivation of name: named after the German botanist Hieronymus Bock, whose Latin name was Tragus, 1498-1554. Worldwide: 100 species in tropical and warm areas Malawi: 10 taxa. Insects associated with this genus:
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| Species | FZ divisions | Content |
| adenanthera Baill. | S | |
| benthamii Baker | S | |
| brevipes Pax | N,C,S | Description, Image |
| grandistipularis Cahen, Magombo & L.J. Gillespie | ||
| hildebrandtii Müll. Arg. | S | |
| kirkiana Müll. Arg. | N,C,S | Description, Image |
| lasiophylla Pax & K.Hoffm. | N,S | |
| okanyua Pax | N,S | Description, Image |
| rhodesiae Pax | C | |
| shirensis Prain var. shirensis [NrEnd] | S |