I can't really tell from the pics, but it looks to me like a "Hetzii" - otherwise known as a Japanese Holly. The damage can be anything.... I would have to see it up close to tell. If it isn't chemical burn, take a paper plate, cup it, and hold it underneath some of the chutes that are part green and part brown. Rub the chutes while squeezing them and pull some of the foliage as you're doing this. After you've collected some on this plate, in good light sort through some of this and look VERY close for mites. This could VERY well be what's doing this. Otherwise, there are varying factors in the stem and leaf tissue to determine if it is a fungus or not. One good thing, is that it will probably rejuvinate.
yah thats a Holly, not sure what kind from the pic, might be a Japanese like Runner said or an inkberry or china boy/girl. As far as the problem, it could be a few things. I don't think it's fungus but it might be because we've had so much wet weather that there's fungus and muchrooms and stuff all over. I'd say it's probly some short of insect.
were the pics taKEN IN SPRING? SUMMER? FALL?? plant looks like helleri holly, or boxwood. ive noticed if they are trimmed very late in the fall/early winter they get that way, or from snow sitting on top of them. try removing them, and throwing them in the trash. we try not to use too many in the holly family, not very hardy. the china's are a bit tougher than the japs
Looks like a root prob if there has been any digging or an insect choking the root. I think this because of the way it is only on one portion of the plant. Unless it is wider spead and we can't see it.