Annuals or perennials. Leaves: lamina variable, from linear to ovate. Inflorescence a panicle, usually much branched, but occasionally ± contracted about the primary branches. Spikelets dorsally flattened, rarely slightly gibbous; lower glume usually shorter than (rarely equal to) the spikelet; upper glume as long as, the spikelet, often with a stipe-like internode between the glumes; lower floret male or barren; its lower lemma resembling the upper glume; upper lemma crustaceous; margin involute and clasping only the edges of the palea. A generally recognisable genus but the following could be confused with it: Brachiaria deflexa, Eriochloa meyeriana, Tricholaena monachne. Worldwide: 500 species or more in tropical and warm temperate zones Rwanda: 23 taxa. Insects associated with this genus:
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| Species | Content | |
| adenophorum K.Schum. | ||
| aequinerve Nees | ||
| atrosanguineum A. Rich. | Description | |
| brazzavillense Franch. | Description | |
| brevifolium L. | Description | |
| calvum Stapf | ||
| chionachne Mez | Description, Image | |
| coloratum L. | Description | |
| deustum Thunb. | Description | |
| eickii Mez | Description | |
| gracilicaule Rendle | Description | |
| heterostachyum Hack. | Description, Image | |
| hochstetteri Steud. | ||
| hymeniochilum Nees | Description | |
| massaiense Mez | ||
| maximum Jacq. | Description, Image | |
| monticola Hook. f. | Description, Image | |
| parvifolium Lam. | ||
| poaeoides Stapf | Description | |
| pusillum Hook. f. | ||
| repens L. | Description | |
| subalbidum Kunth | Description, Image | |
| trichocladum Hack. ex K. Schum. | Description |