Clematis florida var sieboldiana 'Vienetta'  The blooms are 4 inches across, with pure white petals that turn chartreuse in the autumn chill. They surround a large, frilly center of black and purple that resembles a Passionflower! And they arise heavily in early to midsummer, continuing all season. Expect 50 or more blooms on a single plant of Vienetta!   This climber reaches just 6 to 8 feet high, ideal for container growth as well as the garden soil. Pruning Group 3, hardy in zones 6-9
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