Difference: TbSummerButterfly (r4 vs. r3)

'Summer Butterfly' (G. ( P. Brown, R. 1964). TB, 32" (81 cm), Re. Color Class-Y1F, Deep yellow self. Summer Date X Autumn Orangelite. Brown's Everblooming Iris Garden 1965. G. P. Brown, R. 1964). TB, 32" (81 cm), Re. Color Class-Y1F, Deep yellow self. 'Summer Date' X 'Autumn Orangelite'. Brown's Everblooming Iris Garden 1965.