US National Arboretum


Arboretum Plant Photo Gallery
Answer to the Front Page Picture of the Week Question
for June 23rd - July 8th, 2008

Picture of foxglove Digitalis purpurea.  Click here for a larger image.
This is foxglove Digitalis purpurea.

Foxglove is the source of digoxin, a medicine used to treat congestive heart failure and heart rhythm problems. Foxglove is a biennial that sows itself freely in most parts of the United States if the seed pods are allowed to ripen. It can be grown in moist, well drained soil in USDA Hardiness Zones 4 through 8. Flowers are attractive to hummingbirds. Plant leaves, flowers and seeds of this plant are a source of the drug digitalis and are all poisonous to humans and some animals and can be fatal if eaten. Extracted from the leaves, this same compound (digoxin) is used as a medication for heart failure. Digoxigenin is a steroid found exclusively in the flowers and leaves of these plants (and Digitalis lanata) and it is used as a component of molecular probes to detect DNA or RNA. You can see foxglove in the National Herb Garden, where it is scattered throughout the Antique and Heritage Rose Garden and the Theme Gardens.

[Click on the picture to see a larger image].
Be sure to go to the Picture of the Week Archive
or see the links below to view other plant images in our various Photo Galleries.

Go to:
Amaryllis (Hippeastrum) Photo Gallery
Award Winning Daylilies Photo Gallery
U.S. National Arboretum Crapemyrtle Introductions Photo Gallery
Glenn Dale Azaleas Photo Gallery
Fall Foliage Photo Gallery
Photo Gallery Introduction

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Last Updated   June 23, 2008 10:21 AM

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