- Mercurialis, genus Mercurialis - a genus of slender herbs belonging to the family Euphorbiaceae
--1 is a kind of rosid dicot genus
--1 is a member of Euphorbiaceae, family Euphorbiaceae, spurge family
--1 has members:herb mercury, herbs mercury, boys-and-girls, Mercurialis annua; dog's mercury, dog mercury, Mercurialis perennis