Didrik Ferdinand Didrichsen (1814 – 1887) was a Danish

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

 botanist and physicist

Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

. He participated as botanist in the first Galathea Expedition

Galathea Expedition

The Galathea expeditions comprise a series of three Danish ship-based scientific research expeditions in the 19th, 20th and 21st centuries, carried out with material assistance from the Royal Danish Navy and, with regard to the second and third expeditions, under the auspices of the Danish...

 1845–1847. In 1875, he succeeded A.S. Ørsted

Anders Sandøe Ørsted (botanist)

Anders Sandøe Ørsted, also written as Anders Sandoe Oersted or Anders Sandö Örsted was a Danish botanist, mycologist, zoologist and marine biologist. He was nephew of the brothers physicist H.C...

 as professor of botany

Botany

Botany, plant science, or plant biology is a branch of biology that involves the scientific study of plant life. Traditionally, botany also included the study of fungi, algae and viruses...

 at the University of Copenhagen

University of Copenhagen

The University of Copenhagen is the oldest and largest university and research institution in Denmark. Founded in 1479, it has more than 37,000 students, the majority of whom are female , and more than 7,000 employees. The university has several campuses located in and around Copenhagen, with the...

 and director of the Botanic Garden

University of Copenhagen Botanical Garden

The University of Copenhagen Botanical Garden , usually referred to simply as Copenhagen Botanical Garden, is a botanical garden located in the centre of Copenhagen, Denmark...

, whereby the already then much better known Eugen Warming was passed over. After Didrichsen's retirement in 1885, Warming succeeded him in both positions.