Plant Parasites of Europe

leafminers, galls and fungi

gallers on Onosma

Dichotomous table for gallers on Onosma

by Hans Roskam

1a Large globular leaf bud rosette at vegetative tip, about 15 mm across, composed of many little disfigured leaves. Gall midge larvae develop among leaves, each folded leaf containing a single larva. O. frutescens: Janetiella onosmae

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