Urocystis sorosporioides Körnicke, 1877
on Aquilegia, Thalictrum

Thalictrum minus, Denmark © Simon Haarder
gall
blister-like swellings, mostly at the underside of the leaves, that eventually rupture and release a black, granular-powdery mass of spore balls. The spore balls consist of 1-10 spores, invested by a (nearly) complete layer of small sterile cells.
host plants
Ranunculacea, oligophagous
Thalictrum alpinum, aquilegiifolium, flavum, foetidum, minus & subp. pubescens, simplex, sultanabadense.
Redfern & Shirkey associate the species also with Aquilegia amaliae, Roskam (2009a) also A. vulgaris. But Vánky states that only outside of Europe the species occurs in association with columbine.
synonyms
Tuburcinia sorosporioides (Körnicke) Liro, 1922.
references
Ainsworth & Sampson (1950a), Almaraz (1998a), Blumer (1946a), Brandenburger (1985a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Klenke & Scholler (2015a), Ludwig (1974a), Redfern & Shirley (2011a), Roskam (2009a), Savchenko & Heluta (2012a), Vanderweyen & Fraiture (2014a), Vánky (1994a), Vánky & Abbasi (2013a).