- 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.
- 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.
- Clinical signs
- Nausea, emesis, diarrhea and renal failure may be accompanied by weakness, dyspnea, tachycardia and depression.
- Laboratory diagnosis
- is of limited value, but should include detoxification and supportive therapy.
Read more in the Poisonous Plants of Pennsylvania Publication