siderite . ( Of the lat. ) sideritis, and this of the Gr. s? d?(do t?, of s? d?, iron). 1. f. siderosa. 2. f. herbaceous plant of the family of the Labiatae, half sitting, very hairy stems and four to six decimetres length, oblong, trasovadas, toothed and involved leaves, yellow flowers with white upper lip, in separate whorls, and dry fruit with tiny seeds. There are several species, all considered by the ancient remedy to heal the wounds made with iron tools.