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Poisonous Plants

Robinia species Minimize
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species
BLACK LOCUST -  Robinia species

Robinia species

BLACK LOCUST

Description
The pinnately compound leaves have oval leaflets 2-5 cm in length. Fragrant white or cream-colored legume flowers develop into large brown leathery pods containing five to nine seeds. The black locust typically has short (1- to 2-cm) thorns.
Geographic range
Several species of locust trees are naturalized in the woods of the eastern half of the United States. They are also grown as landscape trees.
Toxic principle
Robin, a plant phytotoxin, is similar to the toxic principles found in castor bean (ricin) and rosary pea (abrin). The bark, seeds and leaves contain the toxin.
Toxicity
Consumption of as little as 0.04% of body weight is toxic to horses; cattle may be affected by consumption of approximately 0.5% body weight.
Diagnosis
Clinical signs
Nausea, emesis, diarrhea and renal failure may be accompanied by weakness, dyspnea, tachycardia and depression.
Laboratory diagnosis
non-specific
Lesions
gastroenteritis
Treatment
is of limited value, but should include detoxification and supportive therapy.

Read more in the Poisonous Plants of Pennsylvania Publication

Effect on Animals Minimize
Belgian draft horse approximately 12 hours after ingesting leaves from a black locust tree.  Note depression.  The only significant postmortem finding in other affected horses that died was gastroenteritis.

Belgian draft horse approximately 12 hours after ingesting leaves from a black locust tree. Note depression. The only significant postmortem finding in other affected horses that died was gastroenteritis.
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