Possible Clues:

• Drug-yielding plants
• Stimulant-yielding shrubs
• South American shrubs with potent leaves
• Shrubs with intoxicating leaves
• Andean stimulants
• Andean shrubs
• Intoxicating shrubs
• Train from Costa Rican plants synonymous with the drug-making business
• Chewed Andean stimulants
• Andean drug-yielding plants