Aesculus parviflora (Bottlebrush Buckeye)
Large, suckering shrub for light shade, it will reach 10-18' tall and wide over time. Deep green foliage and early summer spikes of white are great for attracting butterflies and bumble bees. It is hard to describe in words how much activity from insects these plants attract when in flower. If you plant just one and fall in love with it, which you will, you can easily start more from seed. As soon as the buckeyes (seed) mature in the fall, pot them up or plant them immediately. Try to keep the squirrels, chipmunks, and voles off of them! The seed will germinate that fall and the next spring push up a shoot.