Eryngium Aquaticum, also known as water eryngo, is a type of flowering plant that grows in wetlands and marshes. Some synonyms for this plant include marsh eryngo, swamp eryngo, and water thistle. Eryngium Aquaticum has a distinctive appearance with its unique blue-grey cone-shaped flowers that bloom from June to September. Other plants that are closely related to Eryngium Aquaticum include sea holly, parsley, and carrot. These plants have been historically used for medicinal purposes to treat various ailments such as headaches, digestive issues and respiratory problems. Eryngium Aquaticum also has cultural significance in many indigenous American tribes, where it is used in traditional ceremonies and rituals for its cleansing and purifying properties.