P. vulgaris: leases spreading, ovate or oblong, somewhat succulent, covered with crystalline points which give them a wet, clammy appearance; flower-stalks 3-5 inches high, bearing one handsome, bluish-purple flower, the broad campanu-late throat of the corolla attached laterally to the receptacle, and projected below into a slender spur about its own length. - Bogs. Fl. May, June.
Var. grandiflora: larger-flowered and very handsome, with broader lobes to the corolla. - Bogs of south-western Ireland.