Greg Pease wrote about Maryland in one of his "Ask GLPease" columns. Here's what he said:
"Maryland tobacco is, in fact, grown in Maryland, and it’s interesting stuff. The flavour profile is similar to burley, and, like it’s Southern cousin, it bears little to no sugars in the cured product, and absorbs flavourings readily. Unlike burley, however, its nicotine content is very low, and its easy burning characteristics and chameleon-like ability to adapt to its surroundings make it a useful tobacco to add to a blend that needs a little taming. Where it’s a fantastic backup singer, but it’s not so great as a soloist. I don’t know of any blends that feature it, for that reason. Its use has fallen out of favor in recent years, though it still has its place. I used it in one of my old blends from my previous label (Inverness) and I’m working on a few things now. Stay tuned."
Interestingly, he treats it as a separate variety altogether, not as a burley variation.