'Blue Pearl': pale purple/blue blooms with yellow throats.
'Cream Beauty': very hardy plants with yellow throated creamy white blooms.
'Dutch Yellow': large, vivid yellow blooms with darker yellow striping near their bases.
'E.A. Bowles': dark golden yellow blooms with darker golden striping at their bases.
'Ladykiller': white blooms with purple outsides.
'Snow Bunting': pure white blooms.
'Zwanenburg': pale blue/purple blooms with darker purple spotting inside and flushed with gold.
'Zwanenburg Bronze': yellow blooms flushed with bronze on their outsides.