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

mod 15.vii.2017