Podosphaera filipendulae (Zhao) Liu & Braun, 2010
Filipendula ulmaria, Vlaardingen, Holy-natuurpark © Ben van As
Filipendula ulmaria, France, Haute Savoie, Rhône Alpes, Bionnay, 900 m © Arnold Grosscurt
Filipendula ulmaria, Germany, Harz, Wildemann © Hans Jonkman: galled inflorescence
Filipendula ulmaria, Belgium, prov. Antwerp, Geel, Neerhelst © Carina Van Steenwinkel: fungus on galled part of the stem
conidia with fibrosin bodies
mycelium amphigenous, also on stems, white, persistent; infected stems often distorted. Appressoria indistinct. Conidia oval, formed in chains, with fibrosin bodies. Cleistothecia, often in groups, with a single ascus, containing 6-8 spores. Appendages numerous, ± equatorial, 1-5 x the diameter; they are ± stiff, curved, septate, simple, dark brown when mature.
Filipendula kamtschatica, ulmaria, vulgaris.
morphologically, the fungus cannot be distinguished from Podosphaera spiraeae, and on this ground it has long been considered synonymous with that species. However, DNA research has demonstrated that two perfectly separated species are involved.
Braun & Cook (2012a), Bresinsky (2016a), Doppelbaur & Doppelbaur (1973a “Sphaerotheca macularis”), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Leysen (2017a), Scholler, Reinhard & Schubert (1996a [Sphaerotheca spinaeae on Filipendula ulmaria]).