Is this a clematis plant? If it is could you tell me what kind it is.
By Gschmidbau
United States 
It dies back every year, than grows anew from the ground in mid spring to early fall reaching lengths of up to 12' it has these really unique blooms.
3 Sep, 2009
Answers
wow!
I bought one of these and it got eaten by slugs/snails
I have also found some growing up the side of my house
apparently these can be a bit troublsome near drains cos of the roots!
very pretty
x x x
3 Sep, 2009
Burgundy is right passiaflora and it fruits
3 Sep, 2009
What a beautiful flower!
3 Sep, 2009
The flowers are lovely but I do not like the foliage it can be very invasive.
3 Sep, 2009
this particular one is called Passiflora incarnata - it is frost tender, tolerates down to 7 degrees C, so it's rare to find it in Britain except as an annual or under glass. It is known, though, as a very untidy grower - which is what you're complaining about! Nature of this particular plant, I'm afraid.
3 Sep, 2009
Not a clematis I'm afraid. It's Passiaflora, or more commonly called The Passion Flower. Nothing to do with a rise in blood flow, but moreso the opposite, as the flower itself has been likened to the Crown of Thorns that Jesus supposedly wore. I'm sure others will explain the structure more clearly for you.
3 Sep, 2009