[ubuntu] wget -r (only recursive from within a specific directory)

[Th3Professor]

It's been ages since I've used wget... though it looks like it could come in handy for one particular purpose... to recursively download everything contained within a specific directory. However, when invoking the recursive flag/option, it ends up downloading a lot more than what I asked for.

Example:

wget -r http://site.com/directoryZ/

I only want to download recursively from "directoryZ" as a starting point.

It ended up doing this:
site.com/
./directoryA/
./directoryB/
etc.

How do I restrict recursive to only download all that is contained within one specific subdirectory?

Thank you!