Trees and shrubs, without stipules. Leaves opposite, entire, pellucid-punctate, usually with a vein running close to the margin; they are usually fragrant and pungent, due to volatile oil residing chiefly in the pellucid dots or glands.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.