Peronospora lotorum Sydow, 1923
on Lotus

Lotus spec., Belgium, prov. Limburg, Hasselt, Domein Kiewit © Carina Van Steenwinkel

hypophyllous down

conidiopore with two spores

terminal branchings
gall
underside with a greyish-brown fungal down, consisting of 0.6 mm high erect conidiophores that apically several times are dichotomously branching, each terminal branch ending in am ovoid conidium.
host plants
Fabaceae, monophagous
Lotus alpinus, corniculatus, pedunculatus.
Hyperparasitation
Sometimes the stem showed a strong swelling; also, within the stem sometimes a hypha seemed to be there. Probably this indicates hyperparasitation, perhaps by Cladospororium uredinicola, which is known also to parasitise on downy mildews.

swelling at the stem

parasitation ?
references
Blumer (1946a), Brandenburger (1985a: 298), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), García-Blázquez, Göker Voglmayr, Martín ao (2008a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2014a), Kruse, Thiel, Frauenberger ao (2019a), Müller & Kokeš (2008a), Săvulescu (1948a), Voglmayr (2003a).