Beautiful white balls of blooming Viburnum opulus Roseum. White Guelder Rose or Viburnum opulus Sterilis, Snowball Bush, European Snowball is a large, decorative deciduous shrub. Viburnum opulus Roseum, flowers Viburnum opulus Roseum, Viburnum opulus Sterilis, Viburnum bush Snowball Bush, flowering Viburnum opulus Roseum, adoxaceae, botanical illustration, botany, bush guelder rose in bloom, flora of europe, flowering bush, flowering guelder rose, flowers of viburnum opulus, viburnum flowers, viburnum shrub