Lactuca muralis, from González Fragoso (1924a): urediniospores and teliospores

gall

Aecia, uredinia and telia hypophyllous. Aecia often mixed with spermogonia, 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, verruculose, on a short pedicel.

host plants

Asteraceae, narrowly oligophagous

Lactuca alpina, muralis, perennis, quercina, sativa, serriola, viminea.

Not on Chondrilla!

references

Blumer (1946a), Brandenburger (1985a: 675, 689), Gäumann (1959a), González Fragoso (1924a), Jage, Klenke, Kruse ao (2016a), Klenke & Scholler (2015a), Losa España (1942a), Ludwig (1974a), Marková & Urban (1988a), Pellicier (2001a), Termorshuizen & Swertz (2011a).