I'd like to plant a tree in a wedge of land next to a stream and backing up to wetlands. When it rains hard the stream might overflow into the area, but there is not standing water. The area gets partial sun and we're in clay. I'd love to have a weeping form and maybe flowers. The idea is to use the tree as a part of a focal point so I'd like something somewhat unusual.

I'd thought about a laburnum vossi or just a plain old weeping willow. Any thoughts, suggestions, warnings?

Thanks for the help.