Thus, the use of genetically uniform in vitro-derived propagules will be a vital component in large scale cultivation of Pelargonium sidoides. The pharmacological activity of Pelargonium sidoides is partly attributed to highly oxygenated coumarins (7-hydroxy-5, 6-di-methoxycoumarin; 6,8-dihydroxy-5,7-dimethoxycoumarin), gallic acid-derivatives, flavonoids, phenolic and hydroxycinnamic acid-derivatives