3513. Fungi and Lichenes 41 Color Photomicrographs. 1. Stemonitis, slime mold 2. Synchytrium endobioticum, potato black scab, t.s 3. Plasmodiophora brassicae, clubroot, t.s. with young plasmodia 4. Ditto. t.s. with spores 5. Plasmopara viticola, downy mil