Clematis napaulensis is winter flowering clamatis.

Yes, I have C. napaulensis, also C. cirrhosa. I have three of those, 'Freckles', 'Wisley Cream' and my favourite - 'Lansdowne Gem'. They are evergreen except for napaulensis, which is summer-dormant. C. armandii is just coming into flower now, so I suppose that one counts as a winter-flowering plant, too.

Napaulensis is lovely Mouldy, you'll see on my site some seedlings I've just potted up. Another winter one is Winter Beauty.

And in very early spring there is C. alpina

Thanks Pam & Volunteer with my apologies for lateness of my reply.
ISP problems & now playing catch-up.
And not forgetting my sausage-fingers, which, with the compliance of a touchscreen phone, constantly propel me on a magical, mystery tour.

Pam, don't be surprised if your silver leaved cyclamen disappears in the dead of night.
Now where did I put that train timetable? Lol.
It's astonishing.