Plant Parasites of Europe

leafminers, galls and fungi

Protomyces gravidus

Protomyces gravidus Davis, 1907

on Ambrosia, Bidens


lateral, fusiform, smooth swelling on the stem or main leaf veins; initially pale and somewhat transparent, later brownish. In the vascular tissues thick-walled fungal spores are formed.


Asteraceae, narrowly oligophagous

Ambrosia artemisiifolia, trifida; Bidens cernuus, frondosus.


Klenke & Scholler (2015a), Reddy & Kramer (1975a).

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