This is the top level category for plant taxa which have been recognized historically, but are not used currently.

• Angiosperm (flowering plant) articles are listed in one of the "Historically recognized angiosperm ..." subcategories.

• Non-angiosperm articles are listed in one of the more specific subcategories for orders, families or genera where historical usage and nomenclature are clear. All other ranks and mixed usages are listed here.