Species include: Ceratocephalus falcatus and Ranunculus arvensis (corn buttercup)
Toxic chemical involved: ranunculin (a glycoside), which breaks down to protoanemonin
Risk of exposure:
(1) environmental contact
(2) herbal therapy (for hemorrhoids, rheumatoid conditions, wounds, constipation, psoriasis, asthma, gout)
The risk for a skin reaction is greatest if a poultice is prepared and left in place for 24 to 48 hours.
Clinical features of skin lesions:
(1) erythema resembling a burn
(2) vesicles and bullae may occur
Other concerns:
(1) misdiagnosis of child or elder abuse
(2) irritant gastrointestinal reactions if taken internally
