The Common butterwort (Pinguicula vulgaris) belongs to Lentibulariaceae (the Bladderwort family). It is a perennial herb that is found in northern Europe and northern North America, as well as parts of Asia. It grows in moist areas from low mountains to subalpine areas and grows to a height of about 40 cm. The leaves are rosette-shaped, clustered at the base, with thick, slimy surfaces and curled edges. One to four stems grow from the rosette, each bearing a single bright purple flower. It is an insectivorous plant. The leaves have traditionally been used in Europe to curdle milk and make cheese. In English folklore, the plant was also believed to have magical powers.