Even one of the most expensive colleges anywhere (Connecticut College) doesn’t label all their arboretum plants correctly. I found they’ve mislabeled their large Solomon’s Seal plants as P. pubescens. The plants are far too large and lacking the significant hairs of this species. I don’t know if my camera-phone’s photos are sufficient for a clear ID, though. For all I know, though in their native species section, they could have obtained seeds somewhere that sold them a non-native species. Otherwise, I’d lean toward the giant solomon’s seal.
The next point is the berries. They’re sweet, lacking insipid, acrid, bitter, or anything else that would be a problem. Going w/the idea w/plants that we can detect major poisons by taste, if not minor poisons, this isn’t passing that test. I’ve seen it in Sam Thayer’s book as "inedible". I don’t know if all species have the taste I had here, but I can say either this is the 1st clear exception on poison, or it is edible. Any comments are welcome, as I’d like to understand this better. Oh, and, I did eat one berry a little while ago, but may want more info. before eating several at once.