Plant Parasites of Europe

leafminers, galls and fungi

Microbotryum anomalum

Microbotryum anomalum (Kunze) Vánky, 1998

on Fallopia

Microbotryum anomalum on Fallopia dumetorum

Fallopia dumetorum, Belgium, prov. Limbourg, Hasselt, Mombeekvallei, 30.vii.2019 © Carina Van Steenwinkel

Microbotryum anomalum on Fallopia dumetorum


Microbotryum anomalum on Fallopia dumetorum

galled flowers

Microbotryum anomalum: spores


Microbotryum anomalum: spores



The ovaries are swollen and filled with a purplish brown powdery mass of spores. The infection is systemic; infected plants may get a witches’ broom like aspect. Spores 8-14 µm, wall reticulate.

host plants

Polygonaceae, monophagous

Fallopia aubertii, baldschuanica, convolvulus, dumetorum.


Ustilago anomala Kunze, 1877; Bauhinus anomalus (Kunze) Moore, 1992; Ustilago carnea Liro, 1924; Ustilago raciborsksiana Siemaszko & Wróblewski, 1933


Ainsworth & Sampson (1950a), Almaraz (1998a), Brandenburger (1985a: 81), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Jage, Klenke, Kruse oo (2016a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse, Thiel, Klenke, ao (2022a), Negrean & Anastasiu (2006a), Redfern & Shirley (2011a), Savchenko & Heluta (2012a), Scholz & Scholz (2013a), Spooner & Legon (2006a), Tóth (1994a), Vánky (1994a).

Last modified 6.iv.2023