Changes in the plan

When it takes nearly 125 years to complete a work, there will be changes underway. Not only did the texts remain uncompleted, but the plans for the plates were also altered substantially over the years. These changes were largely due to the political situation.

Reductions
After 1814, when the Danish-Norwegian monarchy was dissolved and Norway entered into union with Sweden, almost no Norwegian plants were included in Flora Danica. After 1864, when the Duchies of Schleswig and Holstein were lost from the Danish monarchy, the German section also disappeared.

Expansion
At the Nordic natural science meeting in Roskilde in 1847, a proposal was made that Flora Danica be made into a Scandinavian work. Treatment of the Norwegian plants should be completed and the most important of the plants only found in Sweden added. The proposal was carried and it was decided that a supplement volume (3 parts, 180 plates) should be published with the Norwegian and Swedish plants. Thus Flora Danica became a far more well-rounded work than if it had 'only' included Denmark and its North Atlantic possessions: the Faroe Islands,  Iceland and Greenland. The flora of these areas is naturally radically different from the flora of Southern Denmark,  and the Northern Scandinavian flora provides a transition between these areas.

Plate 30 Oeders lousewort Pedicularis oederi Vahl in Hornem Oeders lousewort is one of the many Norwegian alpine plants from part 1. This plant was as yet undescribed, and Oeder mistook it for another, Pedicularis flammea. In honour of Oeder, Martin Vahl later named it Pedicularis oederi - Oeders lousewort, the name it still bears.