Dichotomous table for gallers on Dorycnium
by Hans Roskam
1a On parts above ground => 2
1b Roots usually with laterally inserted oblong-oval or cylindrical swellings, apically often forked or branched, almost coralloid, sometimes clustered. Dorycnium spp.: Rhizobium leguminosarum
2a On flowers or fruits => 5
2b On vegetative parts => 3
3a On shoot tips or leaves => 4
3b Shoot axis with oblong, reddened swelling. D. pentaphyllum subsp. Germanicum: cf. Melanagromyza cunctans
3c Conspicuous spindle-shaped swelling, bright red coloured, flattened on one side, with rimmed depressions containing the causer. D. pentaphyllum: Planchonia arabidis
4a Leaflets folded. D. pentaphyllum subsp. germanicum + herbaceum: Unidentified gall mite
4b Terminal leaflets of leaf folded, pod-like, reddish discoloured. Containing several at first yellowish-white later orange larvae. D. hirsutum: Dasineura sp.
4c Tip of side shoot with greenish, closed, strongly white pubescent gall, up to 7 mm long and 3 mm thick. D. hirsutum, pentaphyllum: Asphondylia dorycnii
5a Galls on pods => 6
5b lowers disfigured and ± greened, as well as other organs present on shoot tip variously disfigured organs abnormally pubescent. Dorycnium spp.: Aceria euaspis
6a Pod swollen. Inner wall covered with fungus. D. hirsutum, pentaphyllum: Asphondylia dorycnii
6b Pods swollen; mycelium absent. Containing a curved larva with head capsule. D. pentaphyllum & subsp. germanicum + herbaceum: Ischnopterapion aeneomicans