Peronospora hiemalis Gäumann, 1923

on Ranunculus

Peronospora hiemalis on Ranunculus acris: down

Ranunculus acris, Belgium, prov. Antwerp, Geel, Neerhelst © Carina Van Steenwinkel

Peronospora hiemalis conidia and conidiophores

conidia and conidiophores (congo red staining)

Peronospora hiemalis conidia and conidiophores

another image

gall

underside of the leaves with a (greyish) brown fungal down, without a violet hue, consisting of vertical conidiophores that apically several times are dichotomously branching, each branch ending upon a conidium.

hostplants

Ranunculaceae, nauw monofaag

Ranunculus acris & subsp. friesianus, sardous.

synonyms

Peronospora ranunculi-sardoi Săvulescu & Rayss, 1930; P. ranunculi-steveni Săvulescu & Rayss, 1930 – synonyms on the authority of Brandenburger.

references

Blumer (1946a), Brandenburger (1985a: 150), Buhr (1965a), Göker, Voglmayr, Riethmüller ao (2003a), Jage, Klenke, Kruse ao (2017a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2014a), Müller (2015a), Müller & Kokeš (2008a), Negrean (1996b), Riethmüller, Voglmayr, Göker ao (2002a), Săvulescu (1948a).

mod 1.ix.2018