flowers of anise hyssop

The leaves and tiny lavender-blue flowers of anise hyssop (Agastache foeniculum) smell and taste of anise, but its square stems and opposite leaves tell you it belongs to a different family entirely, the Lamiaceae (Labiatae), or mint family. The leaves look a bit like catnip, another mint-family member, but larger. Herb lovers claim it as a culinary herb,

http://floralfridayfoto.blogspot.co.nz/