What type of category does Echium and Oxydendrum have in common?
Echium Echium is a genus of 60 species of flowering plant in the family Boraginaceae.
Echium italicum Echium italicum, the Italian viper's bugloss, Lady Campbell weed, or pale bugloss, is a species of plant from Boraginaceae family, that can be found in the Mediterranean Basin (especially in Italy, hence the name 'italicum') and, as an introduced species in the United States (for example in the state of Maryland).