Plant Parasites of Europe

leafminers, galls and fungi

Podosphaera macrospora

Podosphaera macrospora (Braun) Braun & Kummer, 2008

on Saxifragaceae


Tellina grandiflora, Belgium, prov. Antwerp © Carina Van Steenwinkel

Podosphaera macrospora on Tellina grandiflora

another leaf, underside

Podosphaera macrospora on Tellina grandiflora

tiny cleistothecia

Podosphaera macrospora: cleistothecia


Podosphaera macrospora: cleistothecia

cleistothecia and asci

Podosphaera macrospora: conidiophore


Podosphaera macrospora: conidum



mycelium amphigenous, forming persistent greyish white spots. Appressoria rather indistinct. Conidia formed in chains, with fibrosin bodies. Cleistothecia with a single ascus, containing (6-) 8 spores. Appendages in variable number, mostly sub-equatorial, 0.3 – 3 x the diameter; they are myceloid, mostly unbranched, generally entirely brown.

host plants

Saxifragaceae, oligophagous

Heuchera sanguinea, villosa; Saxifraga nelsoniana; Tellima grandiflora; Tiarella cordifolia, wherryi; Tolmiea menziesii.


North American species, in Europe only on garden ornamentals.

Ampelomyces quisqualis on Podosphaera macularis on Telina

part of the mycelium had a greyish brown colour, because it was parasitised by Ampelomyces quisqualis.


Ampelomyces quisqualis.


Ale-Agha, Boyle, Braun ao (2008a), Beenken & Senn-Irlet (2016a), Bolay, Clerc, Braun, ao (2021a), Braun & Cook (2012a), Bresinsky (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Kruse (2014a), Kummer (2009a), Leysen (2017a).

Last modified 22.i.2023