Arsenicosums, arsenicicums etc. end in -ar. Carbonicums end in -c. One exception because of the weight of usage and tradition is Calcarea carbonica which remains as calc. Cyanatums end in -cy. Previously sometimes -c.
All Irises now begin with Iris- followed by the abbreviation for the sub species.
Lacticums end in -l. Metallicums now have no suffix at all. Arg-m. was changed to Arg. Many metals like Aurum had no suffix, while some like Arg-m. did. The exception to the rule because of the weight of usage and tradition is Arsenicum metallicum which remains as Ars-met.