Is Caltha palustris edible? What You Must Know Before Foraging
                                
                                
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                                    4 min read                                
                            
                                Marsh Marigold, or *Caltha palustris*, is poisonous in its raw state due to the irritant toxin protoanemonin, found in all parts of the plant. Despite this danger, historical records indicate that with extremely careful and thorough cooking, specific young parts of *Caltha palustris* were consumed.