Gunnar Seidenfaden

Gunnar Seidenfaden (1908 – February 9, 2001) was a Danish diplomat and botanist. He was Danish ambassador in Thailand 1955-1959, and in the U.S.S.R. 1959-1961. He was an expert on Southeast Asia Orchidaceae. He published several multi-volume works on orchids, e.g. The Orchids of Thailand – A Preliminary List (with T. Smitinand) and Orchid Genera in Thailand vol. I- XIV. These works are strictly taxonomic and floristic, but decorated with Seidenfaden’s own drawings of flower parts as seen under the dissection microscope. His collection of more than 10.000 specimens was donated to the University of Copenhagen, together with original drawings by Katja Anker and others.

Gunnar Seidenfaden studied botany in the faculty of biological sciences at the University of Copenhagen 1926-1934. He was soon involved in botanical investigations in Greenland. From 1928, he spend six summers in Greenland, partly as a manager of Lauge Koch’s Three-year Expedition to East Greenland. In 1938 he also joined an expedition to Spitsbergen. Unfortunately, he failed his master exam (“magisterkonferens”) in botany and turned to studies of economy and political science; graduating as “cand.polit.” in 1940. He then joined the Danish Ministry of Foreign Affairs in Copenhagen until 1945, after which he was dispatched as economic attaché at the Danish embassy in Washington until 1950. After returning to Copenhagen for five years, he was stationed in Bangkok, Thailand, from where he acted as ambassador to Manilla (Philippines) from 1955, Rangoon (Burma) and Phnom Penh (Cambodia) in 1956 as well as to Vientiane (Laos) in 1957. After his ambassador years, he returned to head the juridical office of the ministry until 1967. He continued to take assignments as Danish envoy at international conferences on environmental matters, e.g. CITES (1973), Helsinki Convention (1979), and the Bern Convention (1979).

In 1938, he won a Scandinavian contest for the best popular science book with “Modern Arctic Exploration”.^[1] During his time in Thailand, he initiated a long-standing cooperation with the Royal Thai Forest Department, with which he arranged a number of collecting expeditions until the mid-1980s. In 1951 he was awarded the knighthood of the Order of Dannebrog, and in 1957 he was given the same of the 1st degree. In 1964 he was made Commander of Dannebrog, of the 1st degree in 1974, and also Commander of the Dutch Order of Oranien-Nassau (Huisorde van Oranje).

He was the son of district attorney and Copenhagen’s chief constable Aage Valdemar Seidenfaden (1877–1966) and Anna Elise Reenberg Teilman Harck (1887–1928). He married Alix Emilie (Lulu) Arnstedt (1914-1993), daughter of ambassador Niels Peder Arnstedt (1882-1954) and Johanne Larsen (1889-1974) and had five children. He was the brother of the journalist and editor Erik Seidenfaden (1910-1990). He was the nephew of Major Erik Seidenfaden (1881–1958), Danish ethnologist and anthropologist who specialized in Thai culture.

He described at least 120 new species. The Orchid genera Seidenfadenia Garay, Seidenfadeniella C.S.Kumar, Seidenfia Szlach., Gunnarella Senghas, Gunnarorchis Brieger have been named to his honour, as has Fadenia, a genus of extinct Permian sharks.

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