A few years ago I traded a friend something (probably homemade jam) for some plant starts. He gave me three echinacea and three hyssop plants; none of them had labels. I've enjoyed these plants over the years but hadn't used any of them medicinally until last week.
Fortunately, two weeks ago, I had one of those ah-ha moments when I was with a couple herbalist friends (my herbalism teachers, to be exact). This ah-ha moment also clarified another small garden mystery involving another plant given to me by a friend. This plant was also unmarked, but I had a clue as to what it was.