Muddy1 said:I think your plant ID apps might be right; it does look like it could be a Goldenrod (Solidago) species to me. Goldenrod won't bloom until late summer - fall, so I would leave it and take photos of the flowers when they do appear for a firm ID.
Your friend might be thinking of "horseweed", but I don't think that's your plant.
ViburnumValley said:Pull up a few of these plants, already!
You say that there are a lot of them. Horsetail (Conyza sp.) is an annual plant, and is easy to pull out of the ground. Goldenrod (Solidago sp.) is a perennial, and spreads into colonies by underground stolons. This is a great way to separate plants that seem to look a lot alike by just comparing leaves/stems.
Looks more like Goldenrod to me. It is definitely NOT Equisetum sp.