I was trimming and cleaning up around a spirea shrub that I have in the back yard, and a piece of it rooted.  I do not need this rooted piece, and I am hoping that someone else can use it.
The shrub gets to be a few feet tall, somewhere around 3-4 feet, I think.  I had this one trimmed to about 3 feet, although a previous one I had got taller.  The leaves are pale green now, and get a little darker during the summer.  They have a little red in them.  The flowers are small pink clusters that come out in the spring but seem to continue into the summer.  In the fall the leaves turn a darkish red.  It roots pretty easily by letting a branch rest on the ground.
I have it sitting in a dish of water on my front steps.  You can see the shrub growing in my front yard when you pick up the cutting.  There are actually 3 shrubs there:  two are smaller ones that have rooted from branches, and the original one which needs to be cut back.  So I may be digging up another one or two in the near future.
Bob
931 Mellon Street (between Wellesley and Jackson)