In the plain of Rusizi the groves of Cadaba farinosa ssp. Adenotricha and Commiphora madagascariensis occur in the form of open vegetation where the groves are more or less widely dispersed in a low and overgrazed lawn.

Xerophilous boqueteaux include plants with obvious sclerophyllous characteristics; their floristic composition is relatively constant, at least at the level of the most representative taxa. In the dominant stratum, we often find Hyphaene petersiana or Euphorbia candelabrum, sometimes both. Occasionally, Acacia sieberana var. vermoesenii and Balanites aegyptiaca also come into play.