Antirrhinum's a genus of plants commonly known as snapdragons from the flowers' fancied resemblance to the face of a dragon that opens and closes its mouth when laterally squeezed (thus the 'snap'). The antirrhinums used to be treated as the family Scrophulariaceae, but studies of DNA sequences have led to the inclusion of Antirrhinum in a vastly enlarged family Plantaginaceae. Taxonomy The taxonomy of this genus's disputed at present. At one extreme, ITIS recognises only the Old World speci… (More on Antirrhinum)