Dark Purple flowers, medium size plant

Hi! I need help identifying a plant that I saw in a container on a Philadelphia street. I would LOVE to know what it is. Thank you! ~Malie

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Is that a Vinca???

 

I don't think it is, but maybe a different kind than I have. Dooley

 

I do not know what it is but I love the color.It is a pretty flower.

 

I think it is a Princess Flower (Tibouchina urvilleana). I don't think that is hardy in Philly.

 

I just did a google search and you are right digital flower, that is exactly what it is. It is hardy in zones 9b-11, not native to the United States and can be used as a container plant. In the ground it will get 15-20 ft tall, but can be kept trimmed to any size.

 

It must just be used as a summer plant in Philadelphia because they get snow in winter. Dooley