Phyllactinia guttata (Wallroth) Léveillé, 1851
Corylus avellana, Diemen. As a result of the mildew infestation, at the underside of the leaves, the leaf margins strongly curve downwards.
Corylus avellana, Zwolle © Arnold Grosscurt
Corylus avellana, Nieuwendam: in autumn the infected spots are recognisable as green islands in the yellowing leaves
cleistothecium, with the swollen bases of the setae that are characteristic for the genus
also young cleistothecia (at right) already show this character.
mycelium both internal and external; external mycelium hypophyllous, thin, greyish or white, sometimes persistent. Appressoria nipple-shaped, hook-like, sometimes branched or somewhat lobate. Conidia formed one by one, clavate, without fibrosin bodies. Conidiophore long and thin. Cleistothecia hypophyllous, with 15-35 asci that contain 2 spores. Appendages 4-12, in an equatorial circle, 1-2.5 as long as the diameter of the cleistothecium. They are acicular, abruptly and strongly swollen at their base.
Corylus americana, avellana, colurna, cornuta subsp. californica, ferox, heterophylla, maxima
Phyllactinia berberidis Palla, 1899.
The reference to Sambucus nigra by Jage, Scholler & Klenke probably stems from cleistothecia that have been brought by the wind from another plant species.
Phyllactinia corylea (Persoon) Karsten, 1900; Ph. suffulta (Rebentisch) Saccardo, 1880.
Abras, Fassotte, Chandelier & Cavelier (2008a), Adamska (2005a), Blumer (1946a, 1967a), Brandenburger (1985a: 63), Braun (1997a), Bresinsky (2016a), Dynowska, Fiedorowicz & Kubiak (1999a), Ellis & Ellis (1997), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Mayor (1971a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Sucharzewska, Dynowska, Kubiak ao (2012b), Talgø, Sundheim, Gjærum ao (2010a), Tóth (1994a), Unamuno (1941a, 1942a).