and some other edible members of the Chenopodiaceae (also known as mercuries), the most similar-looking species is probably Mercurialis annua, annual mercury, which is also thought to be poisonous. Dog's mercury has been eaten in mistake for brooklime. In 1983, a couple was reported of having eaten a large quantity of leaves after washing and boiling the plant after mistaking it for brooklime. Both patients were hospitalized complaining of nausea, vomiting, and severe bilateral colicky loin pain and present signs of malar erythema but no signs of cardiovascular/respiratory disorders. They presented signs similar to an allergic reaction. They suffered severe gastrointestinal complications which led to dehydration. Once the toxin was identified, they were given sodium bicarbonate four times a day to neutralize the acidity of the urine. They recovered after two days of rest and continuous observation and monitoring. An outbreak of fatal mercurialis poisoning in the Welsh mountain ewes was reported which included hemolytic anemia without marrow suppression and acute oedematous gastroenteritis with hepatic centrilobular necrosis. Uses The dog's mercury is poisonous by itself but with a thorough drying/heating, one is able to destroy its poisonous quality. The juice of the plant is emetic, ophthalmic and purgative. It can be used externally to treat menstrual pain, ear, and eye problems, warts, and sores. A lotion can be made from the plant for antiseptic external dressing due to its ability to soften and moisturize the skin. A fine blue dye can be obtained from the leaves although it is able to be turned red by acids and destroyed by alkalis. It is often permanent and colouration is similar to indigo. A yellow dye can be obtained from the leaves. The seeds are also a good source of drying oil. References External links Acalypheae Medicinal plants Plants described in 1753 Flora of Europe Flora of Algeria Taxa named by Carl Linnaeus Dioecious plants