witch's bells en · NOUN
Meanings
-
(uncountable) The foxglove.
I wonder whether the witches would be wearing on their fingers their ornaments of foxglove blossoms, often called witches' bells or harebells, sometimes known as witches' thimbles.
1940, Rosetta E. Clarkson, Green Enchantments: The Magic Spell of Gardens, The Macmillan Company, page 258: