Historical clue formulations

• Mideast shrub with leaves that are chewed as a stimulant — 2026-08-22
• Chewable stimulant — 2023-07-16
• Arabian stimulant — 2017-08-17
• Chewable Mideast stimulant — 2012-11-03
• African plant whose leaves are chewed as a stimulant — 2009-05-28
• Plant chewed in Arabia — 2005-09-11