Plant Parasites of Europe

leafminers, galls and fungi

gallers on Nigella

Dichotomous table for gallers on Nigella arvensis

by Hans Roskam

1a Stem bulging, swollen, also bent, with oval, rimmed, shallow depressions, which contain inducer. Planchonia arabidis

1b Yellowish, often conspicuous bulges on ± curved stems, petioles, leaves and cotyledons bearing aecia and spermogonia. Puccinia actaeae-elymi

1c In similar aecia in Nigella species develops the usually weakly cecidogenic. Puccinia actaeae-agropyri

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