Golovinomyces depressus (Wallrorth) Heluta, 1988

on Asteraceae, Cardueae

Golovinomyces depressus on Arctium

Arctium spec, Nieuwendam: underside of the leaf

Golovinomyces depressus: cleistothecia on Arctium

the darker coloured appendages of the cleistothecia are just visible among the mycelium

Golovinomyces depressus: cleistothecium

the cleistothecium has well over 8 asci, each with 2 spores

gall

mycelium amphigenous. Appressoria nipple-shaped. Conidia short-elliptic, formed in chains, without fibrosin bodies. Foot cell of conidiophore straight, 80-190 µm long. Cleistothecia with 5-15 two-spored asci. Appendages generally numerous, sub-equatorial, 0.5-2 x diameter, mycelioid.

hostplants

Asteraceae, oligophagous

Arctium lappa, minus, nemorosum, palladinii, tomentosum; Centaurea phrygia subsp. pseudophrygia; Cyanus montanus, segetum; Lappa edulis; Onopordum acanthium; Rhaponticum scariosum.

The reference by Heluta ao to Carduus thoermeri [ => nutans subp. leiophyllus] doubtless applies to G. montagnei.

synonyms

Erysiphe depressa (Wallrorth) Link, 1824.

references

Blumer (1946a, 1967a), Brandenburger (1985), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Doppelbaur & Doppelbaur (1973a), Dynowska, Fiedorowicz & Kubiak (1999a), Ellis & Ellis (1997a), Heluta, Hayova, Tykhonenko ao (2010a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse & Jage (2014a), Ludwig (1974a), Mułenko, Sałata & Wołczańska (1995a), Negrean & Denchev (2004a), Sucharzewska, Dynowska, Kubiak ao (2012b).

mod 25.viii.2018