A common guest in our lawns, where you might as well get used to it, because it won’t go away without a fight. Children love the reflective petals, and they look particularly poetic with raindrops on them. The plants are poisonous, but they taste so awful (we are told) that cases of poisoning by buttercup are exceedingly rare.
For a description of the species, see the Ranunculus repens reference page.