Do you grow this plant? You might be right in asking “which one?” because there are a jumble of plants in this photo.
I mean the one with the trifolate leaves and the tiny white flowers. It’s oxalis–but it’s not a pest like the tiny, clover-like weed with the little yellow flowers that grows in your lawns and flower beds.
This is a pretty ornamental. They sell it this time of year as the “Shamrock Plant.” It’s really a bulb.
But if you have the weedy type, don’t be afraid to try this plant. It is completely different.