Looks like Pasilla Bajio.
When fresh, this pepper is called 'Chilaca' it is also known as 'Chile Negro' or Mexican Negro. These 8 to 10 inch long cylindrical peppers are thin walled and start off dark green before ripening to dark brown (75-80 days). They have less than 250 Scoville units and are mainly used dried for their rich, smoky flavoring in sauces. Plants are tobacco mosaic virus (TMV) resistant.