No idea what this species is, but each bloom is about 1/4" in width. In its entirety this plant looks like a perfectly round exploding fireworks display of white flowers atop long stems (three to four "clusters" per plant). I decided to go in-close as most of the blooms were not open therefore the plant was not at its most photogenic otherwise. This is full-frame, but in retrospect I wish I had pulled back on the zoom a tiny bit as some of the buds are close to (or touching) the edge.