Plant identification: a guide to the guides

There are more guides to plants today than ever before. Here is an overview to help you to pick your way through them. 

It’s spring. You’re enjoying a walk through a wood. Primroses are covering the banks, some buttercups are clustered under a Hazel, and along the track there are violets, too. But wait a moment: if you are a true naturalist, this is just not good enough.