Members of the mint family usually have square stems and oils with an aromatic scent.
Flowers are usually whorled at the top of the stem (except scutellaria or skullcap). Each has 5 fused sepals, 5 fused petals that form a 2 lipped tube with 2 upper petals and 3 lower ones. The ovary has 4 lobes.
The leaves are opposite and aromatic. Tiny glands on the surface contain compounds that are strongly scented.