Uromyces festucae-nigricantis Gonzalez-Fragoso, 1914
on Ranunculus
gall
spermogonia in small groups, amphigenous. Aecia hypophyllous, in compact groups, cupulate with recurved margin split into segments,
Aecia on Ranunculus of this type can belong to several species; identification on the basis of morphological characters is virtually impossible. By way of an emergency solution they are collectively addressed as Aecidium ranunculi-acris.
spermogonia, aecia
Ranunculaceae, narrowly monophagous
Ranunculus aconitifolius
Supposed (!) hostplant.
on Festuca
gall
uredinia and telia mainly hypophyllous, on yellow leaf spots. Uredinia soon naked, pulverulent, bright rust-coloured; spores 18-22 x 20-6 µm, with 3-5, sometimes more, germination pores. Telia compact, blackish brown; teliospores one-celled on a persistent pedicel of 14-24 µm.
uredinia, telia
Poaceae, narrowly monophagous
Festuca melanopsis (= nigricans).
references
Gäumann (1959a), González-Fragoso (1925a), Klenke & Scholler (2015a).
20/04/2017