Yes, clematis can be grown from seed - Brian Collingwood has an excellent website outlining the process. Species clems should come true to form but the majority of popular and most frequently planted clematis are hybrids and they will not. And named cultivars of even species clematis may or may not come true to form with regards to specific coloring, etc.

Yes, clematis will grow from seed but will not be the same as the parents. Occasionally some will self seed and it is interesting to see the resulting flowers which may look very much like the parent, but not exactly.

i have grown clematis from traded and collected seed through winter sowing.

Some seeds take two or more winters to germinate.

gardengal gave an excellent link reference.

Thank you so much for your prompt and helpful reply and for the reference.

Mary

Clematis will grow from seed but they require a temperature of 60-70 F at a variable time period up to 1-2 years.