Physoderma menyanthis (de Bary) de Bary, 1874
Menyanthes trifoliata, Belgium, prov. Limbourg, Ham, Immertse bossen, 29.v.2022 © Carina Van Steenwinkel
squash of a sorus
up to vier sporangia per cell observed
te sporangia are thin-walled
measurements in the present material 20-27 x 28-35 µm (n=13)
up to 1.5 mm large, first white or reddish, eventually brown pustules on the lamina.
Cladochytrium menyanthis (de Bary) de Bary, 1897.
Per host plant ce, up to four sporangia were observed. That is in agreement with an illustration by Coupin, but strongly differs from the maximum of 16 that is mentioned by Brandenburger. Klenke & Scholler state the mainly the petioles are infected; that too could not be confirmed in the Belgian material: the petioles were completely clean.
Brandenburger (1985a: 495), Buhr (1964b), Coupin (1911a), Doppelbaur (1973a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Redfern & Shirley (2011a), Scholler & Schubert (1993a), Tomasi (2014a).