Reference

J.-F. Renno, G. H. Schmelzer, J. H. de Jong (1995): Variation and geographical distribution of ploidy levels in Pennisetum section Brevivalvula (Poaceae) in Burkina Faso, Benin and southern Niger – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 198: 89 - 100.