Alyssum Flower Toxicity. Although most horses prefer other more palatable forages over hoary alyssum when on pasture hoary alyssum toxicosis H o a r y A l y s s u m w w w. The toxic principle has not been identified.
E d u h o r s e Hoary alyssum in a pasture Mature hoary alyssum plant. Hoary alyssum is toxic in both fresh pasture and dry hay form. Horses usually react differently to hoary alyssum toxicity.
The bright multiple colors add beauty to the garden.
Hoary alyssum is toxic to horses causing swollen legs laminitis and severe lameness. Although most horses prefer other more palatable forages over hoary alyssum when on pasture hoary alyssum toxicosis H o a r y A l y s s u m w w w. Hoary alyssum has gray-green hairy stems which branches out near the top and stands about 1 to 3. Consumption of large quantities can cause diarrhea leading to dehydration and can cause abortions in pregnant mares.