Plant Parasites of Europe

leafminers, galls and fungi

Peronospora pulveracea

Peronospora pulveracea Fuckel, 1863

on Helleborus

Peronospora pulveracea on Helleborus foetidus

Helleborus foetidus, Belgium, prov. Liège, Aywaille, Carrière de la Falize, © Carina Van Steenwinkel

Peronospora pulveracea on Helleborus foetidus

the infection is systemic, the entire plant is disfigured

Peronospora pulveracea down on Helleborus foetidus


Peronospora pulveracea: conidiophore



leaves abnormally small, disfigured, spoon-like, upperside clearly discoloured; at the corresponding underside a grey-olive – copper-coloured fungal down, consisting of erect, distally repeatedly dichotomously branched conidiophores. The conidia are egg-shaped. The fungus is systemic and hibernates in the rhizome.

host plants

Ranunculaceae, monophagous

Helleborus dumetorum, foetidus, niger, odorus, purpurascens, viridis & subsp. istriacus.


Peronospora hellebori-purpurascentis Săvulescu & Rayss, 1935.


Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a: 146), Buhr (1964b), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2019a), Kruse, Thiel, Klenke, ao (2022a), Müller & Kokeš (2008a), Negrean (1995a, 1996b), Riethmüller, Voglmayr, Göker ao (2002a), Săvulescu (1948a), Scheuer & Bechter (2012a), Tomasi (2014a), Voglmayr (2003a).

Last modified 6.iv.2023