Silver form of M. horridula ( Hort ). There is always variable quality in the plants.   White form.   Typical blue form grown for years in Scotland as M. horridula - clearly these resemble M. prattii.   M. horridula ( Hort ) of Scottish Gardens.                     The form grown in Scottish gardens for many years and probably M. prattii. Flowers in second year and the easiest blue poppy for dry hot climates. Fred Hunt