Plant Parasites of Europe

leafminers, galls and fungi

gallers on Thelypteris

Dichotomous table for gallers on Thelypteris confluens

(incl. Lastrea)

by Hans Roskam

1a Leaf blade with slight swellings, up to 3 mm, yellowish, which bear asci later on the underside. Taphrina lutescens

1b ip of frond distinctly shortened, spirally rolled upwards, with the crowded leaflets making a dense nest. With a white larva on the midrib. Chirosia betuleti

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