I would suggest corkscrew willows over the wild type due to reduced invasiveness. It is similarly short-lived though, but is easily started from cuttings.

http://hort.ufl.edu/database/documents/pdf/tree_fact_sheets/salmata.pdf

Weeping willow is another possibility, and is longer lived but even more messy.

Last edited by RAH; 05/14/16 10:25 AM.