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plant


leaves


seeds


flowers


flowers


petioles

Horse chestnut

Aesculus hippocastanum

Other names

Description

Cultivated deciduous tree with compound leaves, large sticky flower buds in spring and white or pink erect clusters of flowers. The fruit is a prickly capsule with a single flat nut.

Similar plants

A commonly grown hybrid with an American species has pink flowers.

Distribution

Widely planted throughout New Zealand.

Toxin

Toxin is uncertain, probably the glycoside aesculin which is closely related to hydroxycoumarin. Young leaves and flowers are probably most toxic.

Species affected

The nuts and leaves have caused death in cattle and people. Poisoning has also been reported in horses and pigs but is rare in any species.

Clinical signs acute

Nausea, vomiting, diarrhoea, weakness and paralysis; inflammation of mucous membranes.

Clinical signs chronic

Post mortem signs

No specific findings, gastroenteritis.

Diagnosis

History, evidence of ingestion.

Differential diagnosis

Bacterial gastroenteritis, viral gastroenteritis, other forms of toxicities.

Treatment

No specific antidote, can only give supportive therapy and absorbents.

Prognosis

Unknown, but may be fatal.

Prevention


References

Conner H.E. The Poisonous Plants In New Zealand. 1992. GP Publications Ltd, Wellington

Cooper M R, Johnson A W. Poisonous Plants and Fungi in Britan: Animals and Human Poisoning. Her Majesty’s Stationary Office. London. 1998

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