Copyright © 2020 Matthaei Botanical Gardens & Nichols Arboretum.Privacy. Black locust (Robinia pseudoacacia L.) is a legume belonging to the pea (Fabaceae) family. There have been reports of children poisoned by chewing the inner bark or eating seeds. Toxicity Black locust is toxic to humans and can cause discomfort and irritation, but is not life-threatening. The pinnately compound leaves are 8 to 14 inches The fruit is a flat brown pod which contains kidney-shaped beans (fig. Black locust is a fast growing tree that matures to 50-100 feet tall, described as having a “narrow crown and open, irregular form with contorted branches.”  Leaves are alternate, pinnately compound, up to 14 inches long, with 7-21 oval-shaped 1-2” inch bluish-green leaflets on the upper side, lighter green on the underside, turning yellow in fall. Scientific Name: Robinia pseudoacacia Additional Common Names: false acacia Toxic Principle: Black locust’s bark and leaves are toxic, various reports suggest that the seeds and the young pods of the black locust may be edible when cooked, since the poisons that are contained in this plant are decomposed by heat. Cows, chickens, and sheep have also been poisoned. Of grazing animals, horses are most susceptible to the effects of black locust. The black locust grows 40-100 feet tall and is most common in the southeastern states of the United States. Seedlings grow rapidly and are easily identified by long, paired thorns. The leaves, bark, seeds, and stems contain toxic chemicals that cause neurological and gastrointestinal effects. “It tips the balance for the whole plant community by making abundant what once was a limiting essential nutrient. About the author: In a normal year, Katie Stannard would be coordinating and onboarding the summer interns at Matthaei-Nichols and helping the visitor engagement team run the visitor center at Matthaei. Despite the similarities with the pea family most parts of the plant, with the exception of the flowers, appear to be poisonous to both humans and animals when consumed. The leaves, especially wilted leaves, young shoots, pods, seeds and inner bark are toxic. It has an alternate branching pattern, which creates a zigzag effect. Story goes that a black locust fence post will wear out two post holes. I wear a respirator, but running a manual mill and having the dust thrown onto you, it only does so much. Belonging to the Fabaceae or pea family, it is endemic to the southeastern United States, particularly parts of the Appalachians and Ozarks. The tree likes Sun to slight shade at the location and the soil should be sandy to strong loamy . Beyond this, therapy is aimed at preventing further exposure and keeping other animals away from the trees, and treating clinical signs symptomatically. We report the first human intoxication of Black Locust … All parts of the plant contain poisons called toxalbumins (robin, phasin, and robitin), with the seeds containing the highest concentration of these toxins. Symptoms of Black Locust Poisoning in Dogs Depression Weakness Diarrhea Vomiting Respiratory distress Kidney damage Liver damage Convulsions Cardiovascular issues However, most reported cases involve horses … Yes, Black Locust can be toxic to dogs. There have been reports of children poisoned by chewing the inner bark or eating seeds. All parts of a black locust are extremely toxic and can cause severe stomach pain or death in children, pets... Walkway Hazard. They are ½ to ¾ inches long, and very stout. With an extremely durable, impermeable outer coating, seeds last for years in the seed bank. Black Locust Firewood - Toxicity. The consumption of a 1/2 pound of leaves or bark can kill a 1,000-pound horse. Two distinguishing features are flowers and thorns. A horse only needs to ingest 0.04% of his body weight to be poisoned by the black locust tree. The black locust tree (Robinia pseudoacacia) is extremely poisonous if consumed. 2001, 602-604. Black locust tree thorns are poisonous because they produce robin, a fairly strong phytotoxin. In stiffness, it outdoes hickory. If you think that your animal is ill or may have ingested a poisonous substance, contact your local veterinarian or our 24-hour emergency poison hotline directly at 1-888-426-4435. Black locust thorns grow from one-fourth of an inch to one inch in length. Grazing animals, especially horses, may die upon consuming parts of the black locust. Recovery may take days to weeks. Pre pressure treated lumber it was a good source for lumber that needed to survive ground contact. The Black Locust is botanically called Robinia pseudoacacia. CLASS OF SIGNS: Depression, poor appetite, weakness, paralysis, abdominal pain, diarrhea (which may be bloody) and abnormalities in the heart rate and/or rhythm. SYMPTOMS. Black locust contains several toxic components in its leaves, stems, bark and seeds. The tree usually flowers in May or June. Poisoning and death have been reported for horses consuming bark, leaves, or sprouts. And finishes well States and was noted as spreading in jack pine barrens in as. Post holes are particularly at risk, but is not toxic, various reports suggest that locust... Shade at the location and the flowers are creamy white, sweet-pea-like, and a observation. In 1999, and spreads clonally as well as the nervous system and the soil should be sandy to loamy... Yet nonintrusive perennials poisonous if consumed with supportive care and medical observation being standard... 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black locust toxicity

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