What is this shrub in Colorado with white flowers and closely spaced small ovate leaves?

Question

I've got this bush and I'd like to get a few more but I'm not sure what it's called. It has white flowers in early June. I'm in Colorado and it gets full sun.

Answer 1

At this point, my guess is some kind of Spirea. This extremely variable genus has some plants with a very similar growth habit, inflorescence, bloom time, leaf shape, and leaf placement of your shrub. If the shrub looked similar to the one pictured below when in bloom, you have a spirea.