Sulfur cinquefoil (Potentilla recta)
      According to reviews by Powell [60] and Werner and Soule [91], sulfur cinquefoil has a tannin content of 17-22% dry weight that likely lowers its palatability relative to many other forage and browse species. Even when forage and browse choice is limited, cattle have been reported to graze the bitter-flavored spotted knapweed preferentially over sulfur cinquefoil [66]. There are no reports of sulfur cinquefoil toxicity to animals that consume it. I have not trained cows to eat this plant, but I have seen those I trained to eat spotted knapweed graze it with gusto.

Additional Resources: U.S. Forest Service database