An
annual of southern
United States to
Mexico having large whitish or yellowish
flowers mottled with purple and a long curving
beak.
Devil's claw has been used traditionally to treat pain, fever and stimulate digestion. European colonists brough it back to their home-land where it became a popular treatment for arthritis.
A typical dosage of devil's claw is 750 mg 3 times daily of preparation standardized to contain 3% iridoid glycosides.