Dichotomous table for gallers on Colutea
by Hans Roskam
1a Galls on parts above ground => 2
1b Roots with many elongate-cylindrical or also fork-shaped to coralloid branched nodules. Colutea spp.: Rhizobium leguminosarum
2a Younger, already woody twigs irregularly swollen on one or all sides, with several rimmed depressions, containing a broad pear-shaped, white scale of a scale insect. Colutea spp.: Chionaspis salicis
2b Both halves of a leaflet folded upwards and slightly hypertrophied. Containing several flesh-coloured larvae. C. arborescens: Dasineura sp.