Top down view of leaves from the Digitalis purpurea (Purple Foxglove) plant, which are used to make the heart drug Digitalis. Growing in Spring, UK Stock Photo - Alamy
How to Grow Foxgloves | BBC Gardeners World Magazine
Apricot Beauty Foxglove, Digitalis | American Meadows
Foxglove - Toxic to the Heart | Poison Control
Common foxglove, Digitalis purpurea – Wisconsin Horticulture