Plants Poisonous to Livestock

Hoary Alyssum (Berteroa incana) Hoary alyssum can grow as an annual, biennial or short-lived perennial, reproducing by seeds. Stems are gray-green, hairy, one to three feet tall, with many branches near the top. Leaves are alternate, oblong, gray-green and covered with rough hairs, and are one half to three inches long with smooth edges. Flowers are white with four deeply divided petals. Seed pods are hairy, oblong and swollen with a short beak on the end.

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