Hi Mike,
Wouldn't it be easier to tag also the other plants with the different divisions...
les Lycophytes (Lycopodes et Sélaginelles) ;
les Monilophytes (Fougères et Prêles) ;
les Gymnospermes (Conifères, Cycas, Gingko, etc.) ;
les Angiospermes (plantes à fleurs).
Sorry I only have French, and I'm not a plant specialist...