Dichotomous table for gallers on Chamaedaphne calyculata
by Hans Roskam
1a Malformations on leaves and shoots, caused by fungi => 2
1b Axial parts with rimmed depressions; causers under scales up to about 2.5 (3) mm long. Chionaspis salicis
2a Leaves with slightly swollen, sometimes reddened spots, covered with white spores when mature. Exobasidium cassandrae
2b Expanded part of terminal shoot with discoloured and ± deflected leaves, which are smaller or larger and weaker than the normal ones. Eventually with white sori on underside. Exobasidium myrtilli