Fig. 1: H. fraxineus in the wild in the UK.
From: The ash dieback invasion of Europe was founded by two genetically divergent individuals
a,b, Brown/orange lesions on leaves (a) followed by wilting (b). c, Disease progression: lesions on shoots followed by diamond-shaped lesions on the stems. d,e, Wild, sexual reproduction occurs annually on fallen leaf rachises in the leaf litter. f, Dieback of the crown6.
