Hi, My clematis seems to have a fungal (perhaps bacterial) infection. See pictures. I looked it up online and the best I could guess is that it is some form of powdery mildew (absent the defining grayish white structures) or a leaf spot disease. Of course, maybe a couple things are going on. At this point, it seems confined to one vine or a few small vines. The Clematis is irrigated with a drip system, gets morning sun, and gets some air circulation. It's mulched with pebbles and its roots are shaded. Thanks in advance for any suggestions.