Crocus or colchicum?

I attached a pic of some purple flowers growing in our yard (we've owned the house only since July).  If they are colchicum, can I use them for gout flare ups?  We're located in upstate NY, one county north of the Appalaichia "border".

That looks like a crocus, with that white line in the middle of the leaf. Besides, using colchicum medicinally seems like risky business. Or do you apply it externally? Something that is used to turn diploid plants into tetraploid ones can potentially do some pretty nasty things to a human body, I imagine...