Mexican oregano

Short definition from Wiktionary

Noun

1. 1
   A Mexican shrub, Lippia graveolens, not closely related to true oregano, but with leaves that smell and taste like like it.
2. 2
   A Mexican shrub, Poliomintha longiflora, with leaves that smell and taste like oregano
3. 3
   A Mexican and southwestern-US herb related to bee balm, Mt. Pima oregano, Monarda austromontana, which smells and tastes like oregano