Solved Clematis-like climber with small white flowers...

This plant came out of nowhere. It has been lurking for about two years as a small straggly bush before exploding into bloom this summer.

Our resident plant enthusiast has been scratching his head over this one.

Does any one know what it is?

 

Looks like Clematis Grewiiflora

 

Definitely a Clematis sp.
Never come across Clematis Grewiiflora before...interesting.

Clematis on the Web :: clematis detail

Maybe Clematis terniflora...sweet autumn Clematis?

Clematis terniflora - Wikipedia

Or Clematis vitalba?

Clematis vitalba - Wikipedia

 

I grow this clematis. It is called ''Sweet Scentsation'' It has been flowering for a few weeks now, and every time I think it`s finished it seems to start blooming again. Lovely perfume

 

Thank you everyone for confirming that the plant is indeed a clematis as we were not absolutely sure on this point.

I had a sniff just to double check - it has little to no scent so can not be "Sweet scentsation".

The flowers look too different to be "Clematis grewiiflora" or "Clematis vitalba".


"Clematis terniflora" is a possibility, and, following the related google images, it could also be "Clematis virginiana" or "Clematis apiifolia".

Thinking on this further, I do recall that another member did in fact designate that patch for wild flowers to encourage the bees and butterflies a few years back. So, it either arrived as wild seed or as a small plant that was easy to obtain.

 

Next step is to study the leaves on your one and compare it to "Clematis terniflora" / "Clematis virginiana" or "Clematis apiifolia".
It is hard when there are so many with rather similar flower.
Also check when they flower.....rule out any that flower early in the year.

 

A picture of the seed heads on 15th November.

 

I would go with Clematis vitalba aka "Old Man's Beard". I find it to be a tough invasive weed attacking my garden from the neighbouring scrub (wildlife habitat) with enthusiasm.

 

Thought I`d stick these on for comparison purposes