More about that mysterious member of the mint family

Now that it can be seen what brings people to this site, it's clear that there are plenty of people out there looking for information on teucrium canadense. The University of Texas has a beautiful image archive of plants found in central Texas. Unfortunately, it's up to the seeker to know the scientific nomenclature, key to the proper image. The site was found during a search for pictures of Gregg's mist (conoclinium greggii or eupatorium greggii), which is reported on reliable authority to be a butterfly magnet, attracting migratory monarchs in particular.