Anise
Also referred to as aniseed, this is a large flower that is commonly found around the Mediterranean. It produces a black liquorice flavor while still offering a subtle basil tasting note. However, anise is more expensive to grow than star anise, which produces a near-identical flavor. Due to this, unless a gin brand specifically states it uses anise, chances are the gin is actually using star anise (which is not related and comes from Asia).