If I am visitin and hav my medical card in md can I still get flower from pa dispensary or hav to go back to md n go to that dispensary

Not in PA, it's not a reciprocal State. But, you can buy in DC.

My pa card worked in Maine , including edibles which Obviously can’t be purchased in PA

You have buy from md, can't buy in other states

We can only buy from our state not sure about yours..PA. Can only buy from a PA. Dispensaries.