Savannah Holly. This is one of the fastest growing hollies that will make a medium size tree with an extremely heavy berry crop. The color is a pleasing olive green, which gives good contrast to other darker green foliage. This is thought to be a natural hybrid between I. opaca and I. cassine. Its leaves are not as spiny as I. opaca. Here again, when one is looking for a quick screen, this is an excellent choice. It will mature at between 20-25' with an 8-10' spread. It performs best in full sun, but will tolerate some shade.