schemas/VegCore/VegCore.ERD.mwb: changed taxon_name fkeys to taxon_concept where appropriate, and renamed the referencing columns to *_taxon_concept to clearly indicate the referenced table. taxon_concept fkeys are appropriate whenever a taxon is defined or associated with an observed entity, in which case the assertion is not just to a taxon name but to a defined taxon concept (albeit sometimes an unofficial taxon concept scoped by the collector or identifier).
schemas/VegCore/VegCore.ERD.mwb: changed taxon_name fkeys to taxon_concept where appropriate, and renamed the referencing columns to *_taxon_concept to clearly indicate the referenced table. taxon_concept fkeys are appropriate whenever a taxon is defined or associated with an observed entity, in which case the assertion is not just to a taxon name but to a defined taxon concept (albeit sometimes an unofficial taxon concept scoped by the collector or identifier).