These plants (whatever they are) seem to pop up every year in the same place in my garden around May (in France). It's a shaded area, with a well not very far from the spot they grow. To me they kind of develop and look like asparagus (although I know they are not because I have asparagus growing in my garden) and seem to mature around the same time as asparagus.

I've done some research and it may be something from the Broom-rape (Orobanche) family...but I really don't know.

Does anyone have any idea what they are?