Yeah - that was a stalk of wild ginseng. Not weed. LOL
Mauser- If you just saw a stem with red berries - it was probably a Jack-in-the-Pulpit (aka Indian Turnip).
Ginseng's berries usually go red and fall off pretty fast -before the color even starts to drain out of the plant.
Conversely,a Jack-In-the-Pulpit will dry up, leaving just a stem with red berries behind - like in the drawing below.
Here's a picture of a Jack with just the stem and berries left standing.
