JKP: As I have posted You are not allowed to view links. Register or Login to view., the herb looks like the one on You are not allowed to view links. Register or Login to view. , but the pose is indeed interesting. One could assume that theriac is represented here. The root of angelica archangelica / angel's plant was one of the four main ingredients in theriac which was also called "Himmelsarznei" in german. That means "heaven's drug" in english. Unfortunately, this only fits when you look at angelica, not in usual medieval images.
Compared to the real plant, the whole thing looks like this:
Compared to the real plant, the whole thing looks like this:

