LUPIN OR LUPINE (LUPINUS SPECIES) Lupins or lupines (both spellings are correct) are members of the bean family, or Fabaceae. These western introductions were used as ornamentals, but have escaped cultivation to become common in the wild, along roadways and other open spaces. The species are mostly herbaceous perennial plants 0.3-1.5 m (1–5 ft) tall, but some are annual plants and a few are shrubs up to 3 m (10 ft) tall. Their relatives Scotch broom and golden chain are also introductions, from Europe and Asia. A variety of alkaloids and even enzyme inhibitors are associated with lupins. Their toxicity depends upon season, species, and part of the plant. The furry pods dry quickly and are not palatable at maturity. The greatest danger for poisoning is to grazing livestock.