Plant Parasites of Europe

leafminers, galls and fungi

Microbotryum piperi

Microbotryum piperi (Clinton) Vánky, 1998

on Aconogonon


pustules at the underside of the leaf, mainly along the margin, often confluent. They contain a purplish-brown mass of spores.

host plants

Polygonaceae, narrowy monophagous

Aconogonon alpinum (= Polygonum, Persicaria).


Ustilago piperi Clinton, 1904. Ustilago polygoni-alpini (Cruchet) Zundel, 1951 is taken as a valid species by the Index Fungorum (2014), but on the base of Vánky (1994a) is a synonym of piperi.


Brandenburger (1985a: 86), Klenke & Scholler (2015a), Vánky (1994a).

Last modified 4.i.2019