Puccinia lactucarum Sydow, 1900
Aecia, uredinia and telia hypophyllous. Aecia not on strongly discoloured spots, deeply sunken in a pustule, opening by a pore. Uredinia cinnamon brown, soon naked, pulverulent; spores with 3-4(5) germination pores, each one capped by a hyaline papilla. Telia blackish brown; spores two-celled, ovoid, clearly verrucose, deciduous. Characteristic for this species is that from early summer on continuously new aecia are formed.
Asteraceae, narrowly monophagous
Lactuca perennis, quercina, sativa, serriola, viminea
Brandenburger (1985a), Buhr (1964b), Klenke & Scholler (2015a), Negrean (1996b), Vanderweyen & Fraiture (2011a).