I have what I believe is a row of Concord growing in my yard, but not
100% certain. They are bright purple and now if I crush one, it has 4 stones buried within green fruit. It is still very tart and I do NOT get a red stain on the fingers (yet?) when I crush the skins in the hand. I don't have a picture of these, but can compare if someone can help!By the way, I am in the Erie, PA area, but south of I-90 where there are far fewer grapes than North of I-90, where the welch's concords grow en masse.
Now, riding down the road a couple days ago, I saw some grapes growing high up on an old wild apple tree, and I am trying to figure out what they may be. The grapes are beautiful in size and color, the ones in this picture are approximately the same size diameter as a dime or penny. When squeezed, the fruit is white (clear) and also has four stones. The taste is very sweet, maybe like a concord grape, but doesn't taste like welch's or like grape jelly. When I squeeze these skins which are darker, I'd label as black, they do indeed leave a red stain on the fingers. I would also say they have a bit of tannin, but not heavy with it, at least with my small taste.
Here are the links to the pics (about 330K each). I have one of a medium cluster, and one of a leaf with cluster in the background.
Here I have a picture of what I just generically call "wild grapes". These are much smaller, about the size of a pencil eraser, dark purple, very little pulp, very bitter, and stain the hands purple immediately, they're also full of seeds. I made some wine of these last year, needed to make like a fruit wine with lots of water and sugar. Surprisingly it isn't bad, but I'll know more in a year, any help with these would be appreciated as well. These are clearly different from the ones above.
many thanks in advance
Greg, Erie, PA