The one with the biggest snowballs is the chinese one (I think): Viburnum macrocephalum. Smaller flowers are found on Viburnum X carlcephalum, which has the benefit of fragrance also. This seems to come from a cross with v. carlesii (Korean spice viburnum). Linden viburnum seems to go by the name Viburnum dilatatum also, but the species has flat clusters, not balls. Perhaps there is a snowball type cultivar. Other snowball viburnums include cultivars of Viburnum opulus, a European one. Hope that helps.

Mine is in full sun. The entire top died last winter, though I think it had more to do with the night in mid April in the mid teens (after some period in the low 80s) than the cold winter we had. It's regenerating from the roots.

I think emmgus has hit the nail on the head - it is Hydrangea arborescens 'Annabelle', not a viburnum at all. Flowers, leaf shape and size and growth habit all point in that direction. It can be hard pruned if necessary, generally best done in late winter or early spring as new growth emerges. Plant typically only gets somewhere around 3-5' tall but width is variable as it suckers easily and spreads well. Can cover a lot of territory of left unchecked. Looks pretty unkempt, especially in winter, and is probably best located in an out of the way shrub border in partial shade. Good choice for a more of a "woodland" type location. To be honest, the location it occupies in the photo seems quite appropriate (given the rest of the garden is layout in unknown), but it would benefit greatly from pruning and a general tidying up.

I have a horrible site for flowering, fruiting shrubs. [g] The area I need screening is along a back lot line, that backs up to neighbor's properties with Silver Maples. One that is 60 years old and is less than 10 ft on the other side of the fence. Lots of shade and moisture sucking tree roots. I did a lot of reading trying to figure out what to plant and according to many sources, very little would be successful. But I did read a few posts on GW here and there, suggesting a few things to try. I love Viburnums, with their spring flowers and fall color and fruit. So I have tried a couple. At someone's recommendation I tried a Viburnum maresii. It does get less than two hours of sun in the morning and is in the dripline of a Silver Maple. It is growing slowly, but it is growing and looking healthy. It is not scraggly and after the first two years in the ground, it amazed me by blooming it's fool head off, this past spring. lol It also developed small amounts of fruit. It is only about 4ft tall and 5ft wide at this point. I will be surprised if it reaches it's full size, but you never know. I also planted a Viburnum 'Wentworth' about 5ft away from that one and is under a high canopy of a silver maple. It actually gets more sun than the maresii by about an hour. It had a few blooms on it the past two years, followed by fruit, but sparse. I planted it too close to the maresii and ended up moving it for the second time, this fall so they both will have plenty of room. I can't say enough good things about this shrub. First of all, I never got around to planting it the first fall I had it and it sat in a pot in the yard all winter. I thought it was a goner and was going to replace it and I was shocked to find it grew back as if it didn't have a care in the world. So after all that, I can not say why it has had sparse flowers and fruit. But even with less than 3 hrs of sun, and root competition and barely any attention, it has looked perfect every day. No signs of stress on the foliage, dense, fast, growth, and very pretty fall color. It has doubled it's size in 3 yrs despite all it's challenges. It is now in a location that might get 4 hrs of sun, so I hope it will bloom more in the future, since I believe it is now in the perfect location for what I have to offer and I won't be moving it again. We also have Viburnum carlesii, which is my favorite because of the very unusual spicey fragrance of the flowers that I look forward to each spring as much as I do to the lilacs. I worried that it wouldn't bloom but sure enough it had a very good amount of bloom every spring since we planted it. It is planted with a Japanese Maple east of it and on the west side, it is just outside the drip line of that large 60 yr old Silver Maple. It looks wonderful. Growing well, with great branch structure. I love the color of the foliage, it looks great in back of a hydrangea. Lots of fragrant blooms, but have not noticed any fruit. It probably gets about 3-4hrs of sun. Hope that helps some. Good luck. :-) pm2