Bluebells

Bluebells, known as 'Deadmen's Bells' in Scotland, are a flower favoured by faeries and associated with danger. The Scots give the bluebell their moniker because to hear a bluebell ring was to hear one's death knell. It is said to be one of the most powerful of all faery flowers; a bluebell wood is a place of enchantment and faery spells -- and is an extremely hazardous place to be.  

It is believed that anyone who steps into a ring of bluebells will fall under a faery spell and soon die. It is also said that bells rang out to summon the fey to their gatherings. 

Other names for bluebell include Auld Man's Bell, Wilde Hyacinth, Wood Bells, Calverkeys, and Jacinth. 

Bibliography: Faeries, by Brian Froud and Alan Lee. 
Webography: Woodland Trust (http://www.woodlandtrust.org.uk/en/our-woods/views/Pages/bluebells.aspx?wood=4293#.Uci2ufmUQng).

We found these pictures on Google Images (https://www.google.com/search?hl=en&site=imghp&tbm=isch&source=hp&biw=1024&bih=600&q=bluebells+close+up&oq=bluebells&gs_l=img.1.2.0l10.1318.4454.0.6517.9.8.0.1.1.0.42.299.8.8.0...0.0.0..1ac.1.17.img.7_I0SZCZ5AM).