Cyanogenesis in Galegeae, Genisteae, Loteae and Phaseoleae, four tribes of Leguminosae-Papilionoideae, is discussed thoroughly. Oxytropis campestris (Galegeae) is shown to be facultatively cyanogenic (table I); cyanophoric plants contain a zierin-like glucoside. Lotononis crumaniana (Genisteae) is