Bluebell / Harebell (Campanula rotundifolia,
Hyacinthoides non-scripta)
Two different species of plant, both with pretty blue bell-shaped flowers, that both seem to be called bluebell or harebell depending on what part of the world you are in. They also seem to have similar magical properties. Note: the Hyacinthoidesspecies is protected in the UK so please don’t pick any in the wild.

The bluebell is definitely a flower of the faerie folk and also good for helping with shapeshifting magic. It is said to provide protection especially against witchcraft if you rub the flower on your body.

Use dried bluebells in magical workings to bring about the truth in a situation.
Add it to incense blends to aid with healing and to dispel illnesses.
A Kitchen Witch's World of Magical Herbs & Plants - Rachel Patterson

This is a charming book, with an array of simple, practical and magical uses for herbs. Much of the book is concerned with correspondences, so if sympathetic magic especially appeals to you, this is an ideal text to pick up. 

 

It's pleasingly responsible as a text.I picked the above quote because it illustrates this. I find it curious that anyone could confuse bluebells and harebells - bluebells are a Beltain flower of the woods, harebells a late summer flower belonging to grassland. they do however look very similar, and colloquial names for plants can vary a lot one place to another.

 

Rachel includes a helpful set of folk names for herbs and the plants they connect with - all that eye of newt stuff may not be as gruesome as first imagined! This is a really interesting list. I was also fascinated to see a list of Victorian flower associations - the language of flowers being more associated with sending secret messages than with magic. But that's the thing about this kind of pragmatic approach to witchcraft - is something is interesting, appealing, if it works in some way, it really doesn't matter how old it is. What matters is the inspiration and where that takes you.