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I have photographed the following plant in Pittsburgh, PA. It has many blooms and every bloom is very small (about 5mm diameter), purple on the outer and orange in the inner. You can see it here:

enter image description here

What is the name of that plant?

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Here is a listing of a bunch of different butterfly bushes in all their glory! – user9913 Oct 23 '14 at 19:22

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up vote 5 down vote accepted

This looks pretty much like Buddleja davidii to me. They are available in a range of different colors, see this image from the Wikipedia:

enter image description here

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