Gunnar Marklund (5 June 1892 in Helsinki â 23 July 1964 also in Helsinki) was a Finnish botanist (taraxacologist and ranunculologist).
Between 1920 and 1941 he worked as a teacher. In 1937 he received his Ph.D. From 1941 to 1959 he was the curator of the Botanical Museum of the University of Helsinki. In 1963, on the occasion of his seventieth birthday, the 38th volume of the Memoranda Societatis pro Fauna et Flora Fennica was dedicated to him.
Gunnar Marklund specialised in two difficult apomictic groups, the genus Taraxacum (dandelions) and the Ranunculus auricomus group (goldilock buttercups). He published four monographs, in which he described about two hundred new species, among them for example Ranunculus mendax (Markl.) Ericsson, as well as several smaller papers.
Ranunculus marklundii (Nannf. & Julin) Ericsson [â¡ Ranunculus auricomus ssp. marklundii Nannf. & Julin], a goldilock buttercup species known from Sweden and Estonia, and Taraxacum marklundii Palmgr., a dandelion species described from the àland Islands, are named in his honour.