US National Arboretum


Arboretum Plant Photo Gallery
Answer to the Front Page Picture of the Week Question
for Sept 21st - Sept 29th, 2005

Picture of Ricinus communis.  Click here for a larger image.
This is Ricinus communis, or castor-bean.

Hardy in USDA Hardiness Zones 8-11, castor-beans can become noxious self-seeding annuals
that are difficult to control even in colder zones. The deep red capsule shown here (inset) holds
three seeds. The seed coats contain a poison called ricin, as little as one milligram can kill an adult. Therefore, it is strongly suggested that this plant is kept away from children. Castor oil is pressed
from the seed and used to make a variety of products; medicines, paints, lamp oil, and varnishes.
You can view this castor-bean in the National Herb Garden.

[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   September 21, 2005 12:59 PM

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