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the flower makes me think "tree peony," and I think they come in yellow, but I dont' remember what the leaves look like... checking PF... OK, some tree peony varieties seem to have lobed leaves (in photos where you can see more than jus thte bloom), but here's one where the foliage looks like yours: http://davesgarden.com/guides/pf/showimage/17390/
No clue on this specific plant. But you can root a lot of "woody" plants by taking half-hard cuttings (below where it's green and really flexible, but before it turns into a big hard-barked branch) and sticking them in moist soil... my mom has success with several shrubs by sticking prunings behind the shrub where they have some shelter until they root. Or google "air layering," where you wrap a moist medium around the stem until roots form and then take the cutting, already rooted.
Or those who would like this plant can say, well now that I know what it is, I know which plant to order from the nursery! :-)