Will apreciate all help! I have two vines that I've had for several years. One was sold to me as a Clematis. It has large leaves that resemble Clematis leaves , It blooms later in summer and has a large cluster type white bloom. It does not sucker profusely. The second vine grows very tall, suckers all over the place. Has a large cluster type white bloom also later in summer. It is very pretty in bloom but is almost a nuisance. I've looked for pictures of them to no avail. Remember I'm in zone 3 so am limited as to what will survive here. Thanks!