Can you help identify a shrub that was given to me by a coworker?

About three years ago a coworker gave me a clump of a mystery shrub. I put it in a pot and it is still going but I know it needs to be put in the ground. It shoots out reddish maroon, round leaves in the spring that turn green with a fine red boarder later in the spring. In August it displays light pink elongated clusters of what I guess are flowers but look more like little seeds. I live in southeast Minnesota, zone 4. I put the pot in an unheated shed over winter and pull it out in spring, water it, and it comes to life. Can you help me identify it so I can plant and care for it properly? Thanks from Minnesota

Literally "round" leaves or round-ish leaves? Smooth or serrated edges? Entire flower (cluster) stem elongated? or stems of individual flowers elongated?

Linda,

A photo of the plant would be helpful or some additional desciption as suggested by Kate. But in the mean time you might check out Google for photos of (Hebe 'Red Edge' and see if they look anything like your plant

Here is a picture of the mystery shrub. The leaves right now are thick green with a serrated edge. as I mentioned before, the leaves first emerge a reddish/maroon color, smooth and shiny almost round. As they mature, they develop a point and turn green with a thin red margin around the serrated edge. The stems are also red, but not the veins of the leaves The flower clusters appear in mid summer and then the leaves begin to develop tiny red spots, eventually turning mostly red/orange and then dropping off. I hope this additional info is helpful. Thanks, and good luck, Linda

I tried sending a picture but they said it was too large of an image to be uploaded, I'll work on this and try to send it later, Linda

Physocarpus opulifolius, ninebark?? One of the red-leaved sorts?

I checked out ninebark, sorry, not it. I really need to get the picture sent to you. The leaves are round in shape with a point, and the flowers that look like little seeds of light pink, form on elongated stems in groups of ususlly three. After looking more carefully at the leaf edge, I would describe them as ruffled, not serrated, but with a bit of a scallop to them. Thanks for your efforts, Linda

Yes, a picture would be useful. Perhaps more than one (whole plant, leaf closeup, and flower cluster closeup) would be ideal.

Also, your general location would be helpful. It's really useful to know what type of summers and winters (temperature extremes) the plant will be growing in. If you know your zone #, that's usually good enough.

Zone 4, winters don't usually get below -20 to -30. Wow, that sounds awful, I don't even want to think about winter.