JV> I was doing some clean-up yesterday, and trimmed some of the 
JV> deadwood from a rose bush. What are the little knobs that are 
JV> left after a flower dies? Is that a rose hip?
    Yes, those are the hips.  
JV> Whatever it is, should I leave it on the stem or take it off?
JV> What's it do? I guess it isn't a seed?
    They are not the seeds themselves, but instead are the containers in 
which the seeds develop.  If you want the seeds (there are easier ways to 
start roses) then leave them on the stem until they dry out.  If you don't 
they go ahead and remove them.  Either way, it's really of little 
consequence to the plant.
        Byrd Mann
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