Erysiphe tortilis (Wallroth) Link, 1824

on Cornus

Erysiphe tortilis on Cornus alba

Cornus alba, Belgium, prov. Antwerp, Herselt © Carina Van Steenwinkel

Erysiphe tortilis: cleistothecium

cleistothecium

Erysiphe tortilis: cleistothecium

base of the appendages

Erysiphe tortilis: ascus

ascus

Erysiphe tortilis: cleistothecium on Cornus sanguinea

Cornus sanguinea, Amsterdam, Artis: cleistothecium with basal part of the appendages

Erysiphe tortilis: ascus

ascus

Erysiphe tortilis: cleistothecia on Cornus sanguinea

cleistothecia with appendages under the stereomicroscope

Erysiphe tortilis: cleistothecia on Cornus sanguinea

the appendages form bundles, even with those of nearby cleistothecia.

notes

mycelium mainly hypophyllous, effuse, sub-persistent. Conidia solitary, oblong-elliptic, without fibrosin bodies. Cleistothecia with 2-6 asci that contain 3-6 spores. Generally 10-20 appendages, attached to the equator. They are 5-15 x as long as the diameter, not extending but often almost fasciculate vertically erect, light brown, septate; just below the tip they sometimes are forked.

hostplants

Cornaceae, monophagous

Cornus alba, mas, sanguinea & subsp. australis, sericea.

synonyms

Microsphaera tortilis (Wallroth) Speer 1979.

references

Braun (1995a), Braun & Cook (2102a), Bresinsky (2016a), Czerniawska (2001a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Ruszkiewicz-Michalska (2006a), Sucharzewska, Dynowska, Kubiak ao (2012b), Świderska, Wołczańska, Kozłowska ao (2005a).

mod 16.ix.2017