Dichotomous table for gallers on Bunium
by Hans Roskam
1a Malformations of vegetative parts, mainly leaves => 2
1b Centre of umbel or stalk of umbel ± swollen, club-shaped. Inner wall covered with mycelium. Containing a single red larva. B. ferulaceum: Lasioptera carophila
2a Axis of leaves, also young stems, with expanded, sometimes severely distorted, ± yellowish swellings, bearing yellowish spermogonia and aecia. B. alpinum & subsp. corydalinum, atlanticum, bulbocastanum, cylindrium, ferulaceum, pachypodium: Puccinia bulbocastani
2b Leaf sheaths inflated, ± discoloured. B. bulbocastanum: Hyadaphis foeniculi