No nothing to worry about, though don't eat them as they are pisonous. it is the berry spike of a british wild flower common name lords and ladies or Jack in the pulpit or to give it its botanical name Arum maculatum.

If you leave them the birds may eat some or if they don't get eaten they will grow and you will get new plants. They can become a bit of a nuisance however as they have a corm underground.

Great thanks for the info!

yes and if im not very much mistaken you have bind weed growing there as well.

Yes I thought so too. That's the heart shaped twinning leafed plant. I'd act on that with a glyphosate weed killer such as roundup to kill it off and its underground storage system. Now is a good time to spray it.

Deadly nightshade is a bush with black berries.