I searched on this forum for detailed information about pruning hollies, but I came up short. The first step is that I need to identify which hollies I have. Can someone suggest an identification guide?

The only hollies I am familiar with are Burfordii, which I pruned annually in January. The hollies in the yard where I live now are quite different, all of them smaller, and each with a different leaf and habit. I suspect some were not pruned properly by the previous owner.

Thanks!