According to the listing of toxic plants at the Cornell University Poisonous Plants Informational Database, Laburnum anagyroides (common laburnum) is poisonous to cattle, dogs, humans, horses, and swine and the poisonous substance, cytisine, is contained not just in the pods but in the entire plant. It is ideal for ... Laburnum spp. Writer Bio. Can be fatal. ANSWER: I don't definitively provide any information on possibly poisonous plants in the garden.I simply don't have an in depth knowledge of the subject. I grew up with a big laburnum tree in the garden & was always told not to eat the seeds & when I was little wouldn't have been able to get at them when they were green anyway. Buy Laburnum seeds and plants online While laburnum trees are much prized and are grown in many gardens for their beautiful yellow flowers, it should be noted that they are poisonous. Aquilegia spp. All parts of the plant and especially the seeds are poisonous and can be lethal if consumed in excess. Jonae Fredericks started writing in 2007. Anthurium plants are poisonous due to calcium oxalate crystals. Will the leaves and seeds that fall in it cause any problems with growing food crops? Lantana Lantana camara Toxic if eaten, causing nausea and vomiting. The wood of Scotch, or alpine, laburnum (Laburnum alpinum) has a striking greenish brown or reddish brown hue and takes a good polish. Larkspur (young plants & seeds) Delphinium species Digestive upset, nervousness, depression. A laburnum tree is poisonous, so keep it out of reach of pets and children. Laburnum (leaves, seeds) Laburnum anagyroides Toxic if eaten, causing nausea and vomiting. Most animals/birds seem to have an instinctive awareness of poisonous plants however the seeds of the Laburnam tree are poisonous to humans and to poultry. Known as golden chain. Animals Affected Horses, cattle, dogs and humans have been poisoned by eating the seeds. Cardiovascular system affected. Laburnum anagyroides blooms in late spring with pea-like, yellow flowers densely packed in pendulous racemes 4–10 in long. Whilst it would take a serious dose to affect a human it would obviously take fewer to affect a chicken. The seeds are very poisonous when green and less so when they turn brown. The screen will protect the seeds from hungry predators that may otherwise dig up the seeds. The flowers are golden yellow, sweet-scented, and typically bloom in May. If ingested, they can cause nausea and vomiting, and can be lethal in large doses (15 seeds or more). She also has a background as a licensed cosmetologist and certified skin-care specialist. Laburnum, (genus Laburnum), genus of two species of poisonous trees and shrubs belonging to the subfamily Faboideae of the pea family (Fabaceae). Children should be warned not to touch or eat any part of the tree, which could give them severe stomach upset. The sap is irritating to the skin and eyes. 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