`wallflower bowles mauve` flower - erysimum bicolor `bowles mauve`

aetnense arboretum bicolor bloom blossom blue botanical botany bowles brassicaceae breed bud burgeon cultivar cultivation detail erysimum flora flower gallen garden glaucum green hybrid leaf linifolium macro madeira mauve mix natural nature nevadense petal plant portugal portuguese purple saint shrubby swiss switzerland teretifolium violet wall wallflower