Erysiphe ulmariae Desmazières, 1846

on Filipendula

gall

mycelium amphigenous, also in the stems, persistent only around the cleistothecia. Appressoria lobed. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia with 6-16 asci, that contain 6-8 spores. Appendages sub-equatorial, sometimes equatorial, 0.3-6 x the diameter; they are mycelioid, not or little and irregularly branched, septate, initially hyaline, ultimately yellow to brown.

host plants

Rosaceae, monophagous

Filipendula kamtschatica, ulmaria, vulgaris.

references

Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (1995a), Kruse (2019a), Losa España (1942a), Scholler & Schubert (1993a).

mod 22.vii.2019