Dichotomous table for gallers on Conopodium majus
by Hans Roskam
1a Bulging galls, bearing fungal sori on vegetative plant parts => 2
1b Centre of (partial) umbel stalk swollen, globular to club-shaped. Gall wall rigid, covered inside with mycelium. Containing a red larva. Lasioptera carophila
2a Yellowish to brownish, ± distinct swellings on leaf veins; stronger, sometimes distorted bulges on leaf midrib and -stalk, also on young stems; pads bearing densely positioned telia. Puccinia tumida
2b Less conspicuous, bulging yellowish swellings on leaf axis bearing aecia.
Puccinia bistortae