You are both correct!

It is silphium. I thought it was interesting, because even in ancient times, when the world's population was much smaller, there was a problem of over utilization of resources. As we destroy more and more of the rainforests, I wonder what medical miracles we're losing.

To see pictures of Kyrenakia's coins depicting silphium, visit Silphium: Ancient Wonder Drug?. This article was the inspiration for my trivia question.

*passes off the trivia mantle to Keshiki* Your turn! :)