C. montana Peveril
More in appearance to C. chrysocoma than C. montana. The very attractive 3"(8cm) pure white flowers are produced in June and July. Mature height 15-20'(4.5-6m) (all montanas will have severe frost damage when minimum temperatures fall below 0 to -10F (-12 to -18C). The plants will probably survive, however, the tops will be burnt off and the plants will not bloom. Pruning group A..