Salix caprea, Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman

the cleistothecia are recognisable als tiny brown dots

cleistothecia under the stereo microscope

cleistothecium with appendages

hooked tips of the appendages

Salix caprea, Biddinghuizen, Spijkbos leg. Hans Jonkman: the microphoto’s suggest that the appendages extend horizontally, but actually they are directed more or less vertically.

gall

mycelium amphigenous. Appressoria lobed, multilobed or coralloid, solitary or paired. Conidia solitary, elliptic, without fibrosin bodies. Foot-cell of conidiophore cylindrical, 20-70 µm. Cleistothecia with 4-15 asci, containing 3-6 spores. Appendages 30-110, equatorial, 1-2 x the diameter; they are hyaline, aseptate, unbranched, almost straight; the apex is uncinate-circinate.

host plants

Salicaceae, narrowly monophagous

Salix caprea.

references

Braun & Cook (2012a), Klenke & Scholler (2015a), Kruse (2019a), Kruse & Jage (2014a), Leysen (2017a).