The aromatic oils in plants contain the same sorts of chemicals like terpenes as in cannabis, and many are known to be pharmacologically active, including mental effects. Myrcene, for instance, is abundant in most cannabis and also found in verbena, lemon grass, hops, mango, West Indian bay tree, and cardamom.

For example here’s a paper about the psychological effects of mint oil: Volatile Terpenes and Brain Function: Investigation of the Cognitive and Mood Effects of Mentha × Piperita L. Essential Oil

Another one…
Therapeutic and Medicinal Uses of Terpenes