Cytisus laburnum syn Laburnum anagyroides (common laburnum, golden rain tree, golden chain). Related species are equally toxic:

C. alpinus syn Laburnum alpinum (Scotch laburnum);
C. purpureus;
C. biflora;
C. weldenii.

A member of the plant family PAPILIONACEAE (LEGUMINACEAE). Common ornamental tree or shrub with trifoliate green leaves and bunches of pendulous yellow flowers. These develop into flat hairy, pea-like pods which become black on drying, releasing minute dark brown seeds.


[affected.gif] Animals most affected
Horses, cattle, dogs, poultry.


[etiology.gif] Etiology
Ingestion of branches, leaves and bark in times of food shortage (horses, cattle) and of the seeds (dogs, poultry).


[toxic.gif] Toxicity
Contains the alkaloids cytisine, methylcytisine, laburnine and laburnamine, which are found chiefly in the seeds (up to 3%) and leaves (0.3%).

Oral doses are not well-established:
LD in g seeds per kg body weight
horses 0.5-0.8
hens 6
small ruminants and rabbits are relatively resistant to the compounds.


[clinical.gif] Clinical features

Additionally in the horse


[lesions.gif]
Lesions
Non-specific.


[toxic.gif] Treatment
No specific antidote. Symptomatic care only: