Creeping perennial herbs, rooting at the nodes. Leaves opposite, simple, subentire to toothed; lamina with appressed, medifixed hairs. Inflorescences ± long-pedunculate, axillary, short, ovoid to cylindric, very dense bracteate spikes. Calyx membranous, 2-lobed, flattened. Corolla with short tube and spreading irregularly ± 4-lobed limb. Stamens 4. Fruit of 2 nutlets, enclosed by a persistent calyx.
Worldwide: c. 11 species in tropical and warm areas
Zimbabwe: 1 cultivated taxon.
|No image of a cultivated species but there is an image of a native or naturalised species