Plant Parasites of Europe

leafminers, galls and fungi

Ochropsora ariae

Ochropsora ariae (Fuckel) Ramsbottom, 1923

on Anemone

Ochropsora ariae on Anemone nemorosa

Anemone nemorosa, Belgium, prov. Limbourg, Guigoven, Belle-Vue-bos, 9.iv.2019 © Carina Van Steenwinkel: infected plant, surrounded by healthy plants

Ochropsora ariae: aecia


Ochropsora ariae: peridium cells

peridium cells

Ochropsora ariae: aeciospores


Ochropsora ariae on Anemone nemorosa

Anemone nemorosa, Amstelveen, de Braak, 3.v.2014: the fungus is systemic; an infected leaf often is unusually pale; always the petiole is strongly elongated, causing the leaf to rise well above the surrounding plants.

Ochropsora ariae on Anemone nemorosa

upperside; the leaf segments are strongly narrowed.

Ochropsora ariae on Anemone nemorosa

the complete underside is strewn with aecia.

Ochropsora ariae on Anemone nemorosa

the aecia are sunken in low pustules.

Ochropsora ariae on Anemone nemorosa

the peridium is untidy and soon drops off.

Ochropsora ariae on Anemone nemorosa

the aeciospores in the floor of the aecium are white.


spermogonia epiphyllous. Aecia mainly hypophyllous, dispersed over the entire leaf; peridium white. Infection is systemic.

spermogonia, aecia

Ranunculaceae, monophagous

Anemone blanda, nemorosa, ranunculoides, trifolia.

on Sorbus and other woody Rosaceae


uredinia hypophyllous, small, grey or yellowish spots, surrounded by a row of basally fused paraphyses that take the role of a peridium. Telia hypophyllous as well, flat flesh-coloured crusts of 0.5 mm, initially covered by the epidermis. The teliospores are sausage-shaped, standing erect, when mature consisting of four cells with a thin, hyaline and smooth wall. (In fact, that have germinated than already into a basidium).

uredinia, telia

Rosaceae, oligophagous

Amelanchier asiatica, ovalis; Aruncus dioicus; Malus domestica, sylvestris; Prunus avium, cerasus, padus, tenella; Pyrus communis; Sorbus aria, aucuparia, hybrida, intermedia, latifolia, torminalis.


Ochropsora sorbi (Oudemans) Dietel, 1805.


Tuberculina persicina.


Ben van As repeated finds isolated, strongly enlarged and late flowers of Anemone nemorosa, like in the picture below. Although no aecia have been seen it cannot be excluded that this is a symptom of infection by O. ariae. (In the immediate neighbourhood several rowan trees were growing).

? Ochropdora ariae on Anemone nemorosa

Anemone nemorosa, Assen, Asserbos, 3.v.2013 © Ben van As

? Ochropdora ariae on Anemone nemorosa


? Ochropdora ariae on Anemone nemorosa

comparsion with a normal flower


Bahcecioglu & Gjaerum (2004a), Bahçecioğlu & Kabaktepe (2012a), Buhr (1964b), Coulianos & Holmåsen (1991a), Dauhpin & Aniotsbehere (1997a), Dietrich (2016b), Gäumann (1959a), González-Fragoso (1925a), Garcia-Guzmán & Wennström (2001a), Groom (2011a), Helfer (2005a), Henderson (2000a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Leysen (2013a), Ludwig (1974a), Maier, Begerow, Weiß & Oberwinkler (2003a), Poelt & Zwetko (1997a), Preece & Hick (1994a), Redfern & Shirley (2011a), Riegler-Hager (2014a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Savchenko, Heluta, Wasser & Nevo (2014c), Savchenko, Wasser, Heluta & Nevo (2019a), Schmid-Heckel (1985a), Termorshuizen & Swertz (2011a), Tomasi (2014a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).

Last modified 5.v.2023