The herbarium of vascular plants, i.e. fern allies and seed plants, comprises about 2 million vouchers and is divided into a Nordic and an Extranordic collection, respectively.
The Nordic herbarium is very exhaustive. Digitisation of the collection started in 1994, but has been interrupted during some periods. New registrations are now added continuously to the general database.
The Extranordic herbarium has been enriched with vascular plants from the whole world through research expeditions and extensive exchange with international herbaria. The collections from the Mediterranean region are the most extensive with, for example, ca. 100 000 vouchers from Greece. The Greek vascular plants are already almost completely registered in the general database through collaboration with Flora Hellenica.
Pioneer collections by L. Preiss in Western Australia and K. Th. Hartweg in Latin America are of particular value. Paul Sintenis's herbarium with more than 100 000 vouchers, perhaps half of which from Turkey, is one of the largest and most valuable individual collections.
The herbarium of vascular plants is presently searched for all type material, which is transferred to a separate type herbarium. The types are registered and the information continuously added to the general database.
The Acharius herbarium and the Retzius herbarium mainly contain vascular plants collected during the 18th and early 19th century. These two herbaria include, among other, more than 500 type specimens. Both collections are already completely registered in the Retzius database.