Robinia pseudacacia, Belgium, prov. Antwerp, Meerhout © Carina Van Steenwinkel

upon heavy infestation the long flaccid appendages stick together and form a felt-like mass

cleistothecium

asci

tip of the appendages

gall

mycelium amphigenous. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia with 3-6 asci, containing 4-5 spores. Appendages 5-10, inserted on the equator, generally 4-12 x the diameter; they are 0-1 septate, flaccid, brown at most at base; the tips are mostly several times irregularly branched, not flattened.

hostplants

Fabaceae, oligophagous

Colutea arborescens; Robinia pseudoacacia.

synonyms

Microsphaera pseudacaciae (Marchenko) Braun, 1981.

references

Beenken & Senn-Irlet (2016a), Braun (1995a), Braun & Cook (2012a[“pseudoacaciae“]), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Negrean & Anastasiu (2006a).