Princeton's WordNet

1. ground ivy, alehoof, field balm, gill-over-the-ground, runaway robin, Glechoma hederaceae, Nepeta hederaceae(noun)

   trailing European aromatic plant of the mint family having rounded leaves and small purplish flowers often grown in hanging baskets; naturalized in North America; sometimes placed in genus Nepeta

2. lesser calamint, field balm, Calamintha nepeta, Calamintha nepeta glantulosa, Satureja nepeta, Satureja calamintha glandulosa(noun)

   low-growing strongly aromatic perennial herb of southern Europe to Great Britain; naturalized in United States