Sphaerulina cornicola (de Candolle) Verkley, Quaedvlieg, & Crous (2013)
on Cornus

Cornus sanguinea, IJmuiden

the spots generally have a purple border; with a hand lens tiny black specks are visible at the upperside of the spot

they are the opening of pycnidia, that themselves are less than 0.1 mm in diameter.
hostplants
Cornceae, monophagous
Cornus sanguinea.
synonyms
Septoria cornicola (de Candolle) Desmazières, 1867; Phyllosticta cornicola (de Candolle) Rabenhorst, 1857.
notes
Very common.
references
Brandenburger (1985a: 419), Ellis & Ellis (1997a), Riegler-Hagler (2002b), Ruszkiewicz-Michalska (2006a).
Last modified 26.x.2022