Erysiphe mayorii var. mayorii Blumer, 1933

on Cirsium

gall

mycelium amphigenous, also on the stems, mostly thin and colourless, consisting of long, hardly branching hyphae. Appressoria lobed, single or paired. Conidia solitary, oblong-elliptic, without fibrosin bodies. Cleistothecia with 6-30 asci, that contain 6-8 spores. Appendages numerous, sub-equatorial, mostly shorter than the diameter; they are mycelioid, septate, little and irregularly branched, eventually brown.

hostplants

Asteraceae, monophagous

Cirsium arvense, erisithales, helenioides, heterophyllum, oleraceum, palustre, rivulare, vulgare.

references

Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (1995a), Kozłowska, Mułenko & Heluta (2015a), Ruszkiewicz-Michalska (2006a).

mod 25.viii.2018