A foxglove is a tall plant that has pink or white flowers shaped like bells growing up its stem.
foxglove in British English
(ˈfɒksˌɡlʌv)
noun
any Eurasian scrophulariaceous plant of the genus Digitalis, esp D. purpurea, having spikes of purple or white thimble-like flowers. The soft wrinkled leaves are a source of digitalis