A mandrake is chained to a dog. When the dog runs away, the mandrake will be pulled out of the ground.
The image was obtained from the source listed below.
British Library - Images Online
British Library, Harley MS 1585, folio 57r
This image may be copyright. For permission
to use this image in any form, you must contact
the copyright holder, if any.
Possible copyright holder: British Library
The copyright holder states this image is in the public domain.
Medieval Bestiary site copyright information