Potentilla anserina (silverweed, goose tansy, trailing tansy,wild tansy, silvery cinquefoil moor grass, wild agrimony). A member of the plant family ROSACEAE. Perennial herbaceous silky herb, with long, creeping stems or stolons bearing adventitious roots. Large oval leaves, covered on both side with a silky white down, alternating with pairs of deeply toothed leaflets; brilliant yellow flowers in inflorescences. The fruit are smooth achenes with hairy receptacles.

[affected.gif] Animals most affected
Horses, (cattle, sheep, goats).

[etiology.gif] Etiology
Ingestion of the fresh plant or of contaminated fodder. Poisoning is rare due to the need to consume large quantities continuously for several days.
Contains tannins and tormentol. The whole plant is toxic, especially the stem roots. Drying does not reduce its toxicity.

Toxic oral doses not well established:
TD horses where the hay contains 25% of potentilla, and is consumed for several days


[clinical.gif] Clinical features In horses

[lesions.gif] Lesions

[treatm~1.gif] Treatment
No antidote. Symptomatic care only: