MICHAEL MARTEN / SCIENCE PHOTO LIBRARY MICHAEL MARTEN / SCIENCE PHOTO LIBRARY
Flowers of the foxglove plant Digitalis purpurea. The foxglove grows in bright, dry habitats such as open hillsides and forest clearings. The flowers are pollinated by insects seeking the rich store of nectar at the base of the flower's ovary. An extract from the leaves of the foxglove plant is used as the source of the drug, digitalis. It contains substances such as digitoxin and digoxin, which stimulate the heart muscle. In cases of heart failure the drug is administered by mouth, or in serious cases, by injection.
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