Montana Group. (Syns: c. chrysocoma var. sericea) - White 2-in. flowers, sometimes flushed pink down the center with blunt tips and graceful, wavy edges and creamy white stamens. Flowers are borne on long 7.5-in. flower stalks. Flowers late spring to early summer. Height: 20-30 feet, No Pruning, Zones: 6-9, Sun/ Part Shade |