Hey Julia,
I found a Tuberculina species on Puccinia punctiformis on Cirsium arvense. On that host I assumed it would be T. persicina.
I checked it microscopically and I noticed immediately that the size of the conidia didn't fit for T. persicina. The specimen possed much larger conidia, the size was 11-15 µm. This fits for T. maxima.
I double checked the materiaal, taking samples of sori present on several leafs, all of them had such larger conidia.
Photos in attachtment.
According to Klenke and Scholler:
Size condiospores: 10 -14 µm on Cronartium, Gymnosporangium: T. maxima
Size condiospores: 7-8 (10) µm: T. persicina on several rusts
Do you have info of observations of T. maxima on Puccinia species?
Can you confirme the determination?
Best regards,
Carina