Final answer:
The concept behind the example is the Doctrine of Signatures, which suggests that the appearance or characteristics of a plant can indicate its potential uses or benefits for humans.
Step-by-step explanation:
The concept behind the example you provided is the Doctrine of Signatures. This concept suggests that the appearance or characteristics of a plant can indicate its potential uses or benefits for humans. In this case, the fact that the Boneset plant's stems grow through leaves may be seen as a sign that it has healing properties for bones.
In the Doctrine of Signatures, it is believed that plants with physical resemblances to certain body parts can be used to treat ailments related to those body parts.
It's important to note that the Doctrine of Signatures is a historical belief and is not supported by modern scientific evidence.