‘Diablo’ mix - Reddish bronze foliage on dwarf, compact plants (1 to 1.5 feet tall) with double flowers. Seven different flower colors.
‘Fresco’ mix - Very dwarf, compact plants (1 foot tall), with a variety of flower colors in double blooms. Very reliable.
‘Harlequin’ mix - Single flowering plants with inner ruffs of petals (collarete type) in color contrast to outer petals. Variations on yellow, orange, and and white. Very dwarf plants (1 foot tall). Early bloomers.
‘Mignon’ mix - Dwarf plants (14 inches tall) with single flowers in a variety of colors.
‘Figaro’ Series - Very dwarf plants (1 foot tall) with double flowers in a variety of colors. Very compact and showy.
‘Redskin’ - Various color double flowers on 1- to 1.5-foot tall plants with bronzed foliage tinged with red or brown.
More information: American Dahlia Society