Clematis Florida sieboldii or sieboldiana or bicolor is the sister plant to the Florida Plena or alba plena Florida Sieboldii has a huge flowering period June to October inc. at least 5 months of flower every year. The Florida Sieboldii enjoys a sunny spot in the garden which is sheltered for best results. - florida Sieboldii.

Sometimes the flowers can revert back to the Plena form, sometimes its just 1 flower, sometimes its a full stem, sometimes its the whole plant! its been around in this country since 1864 (when it came over from Japan) and has always done this.

If you scroll down the pictures below, you will even see a flower that has both flower parts (purple and green!)