New York, United States

Who can tell me what this succulent ground cover is? It seems to be everywhere though I pull it up continuously. It spreads like a carpet. An electric lime green with these yellow star flowers. It doesn't seem to harm anything, but it's always there and spreads quickly. It will sprout from a leaf, stem or root with a trailing habit. I think it likes shaded, sheltered areas, but not deep shade - under a bush or along a wall, never out in the open.

• 26 May, 2019