Puccinia major Dietel, 1894

on Crepis

Puccinia major: aecia on Crepis paludosa

Crepis paludosa, England, Vice County: Mid-west Yorkshire, VC64: group of aecia, a few spermogonia in the centre; © Malcolm Storey, BioImages

gall

No host plant alternation. Spermogonia between the aecia. Aecia hypophyllous in circular groups, cupulate, yellow with recurved margin, on yellow spots, also on veins and petioles. Uredinia amphigenous, pulverulent, cinnamon brown, appearing after the aecia, also often on yellow spots. Urediniospores 19-21 x 19-26 µm, with 2 ± equatorial pores, not capped by a papilla. Telia as the uredinia but blackish brown; spores 21-33 x 28-48 µm, two-celled, finely verrucose, on short, hyaline pedicels.

hostplants

Asteraceae, narrowly monophagous

Crepis paludosa, pantocsekii.

references

Blumer (1946a), Brandenburger (1985a), Buhr (1964b), Doppelbaur (1968a, 1973a), Ellis & Ellis (1997a), Gäumann (1959a), González Fragoso (1924a), Henderson (2000a, 2004a), Jage, Scholler & Klenke (2010a), Losa España (1942a), Marková & Urban (1988a), Negrean (1996b), Poelt & Zwetko (1997a), Preece & Hick (1994a), Redfern & Shirley (2011a), Ruszkiewicz-Michalska (2006a), Schmid-Heckel (1985a), Termorshuizen & Swertz (2011a), Tomasi (2012a), Vanderweyen & Fraiture (2011a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).

mod 4.viii.2018