Can anyone tell me what variety this is and where I can find it? I saw this planted at the Portland City Hall and love it, but can't seem to find it. It's Impatiens Omeiana, but I'd like to know if there is a particular variety. This has very dark leaves and are long, approximately 5-6 inches. I've tried several garden centers who have Omeiana, but none look quite the same.

I appreciate any help you all can give. Also, if you know where to find it, that would be appreciated also.