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Image from Manuel M. Ramos
Name
Xanthium strumarium
Description
Annual weed with irregular, mottled stems, which grows one to two feet. Leaves are thick, and alternate. Flowers are small and on short branches. Fruit is a bur with hooked spines and sharp beaks.
Image from dinesh_valke
Concern Level
Only during drought conditions, unpalatable.
Toxic Parts
The whole plant is dangerous, seeds most toxic.
Image from JanetandPhil
Symptoms
Lack of appetite, depression, weak pulse. Burs can cause physical damage to mouth and throat.
Danger
Contains carboxyatractyloside which affects the nervous system.
Image from Peter Baer
More Information
*It should be noted that we are not veterinarians. This information is written specifically for horses and should be used for reference purposes only. If you think your horse has eaten something toxic call your vet right away.