To date, no drug has been approved in its leaf form because plants contain a complex composition of compounds with uncertain pharmacologies, metabolisms, side-effect profiles, toxicologies, drug interactions, and no control of relative concentrations.

ECONOMIST: Egypt's challenge

The identification of molecular markers linked to loci affecting leaf morphology traits resolves conflicting hypotheses on the genetics of these complex traits and has potential for molecular breeding improvement of white clover.

FORBES: The Four-Leaf Clover Gene?