“…The results of inheritance studies of these pigments (Marshall et al, 1983) were used in breeding for scarletred and white flowers. 'Morden Fireglow' was developed through the selection of its parents on the basis of a chromatographic determination of anthocyanin pigment content (Collicutt, 1991;Marshall, 1975). This cultivar combines winter hardiness with a unique scarlet-red flower, a color rarely seen in hardy roses.…”