yer·ba bue·na 
(yârbə bwānə, yûrbə)
(yârbə bwānə, yûrbə)n.
1. A trailing perennial plant (Clinopodium douglasii) in the mint family, having fragrant leaves and white or purplish flowers, used in herbal medicine and to make a tealike beverage.
2. Any of several other fragrant plants in the mint family.
[Spanish : yerba, herb + buena, good.]