Per Karl Hjalmar Dusén
Encyclopedia
Per Karl Hjalmar Dusén was a Swedish civil engineer, botanist and explorer. As a botanist his interests included pteridology, bryology and paleobotany. He made botanical expeditions to Africa, Greenland and South America.
Between 1890 and 1892, Dusén collected nearly 560 leaf fossils preserved in basalt in the vicinity of Mount Cameroon on the west coast of Cameroon. Later, these fossils were studied by the German paleobotanist Paul J. Menzel (1864-1927).
His botanical specimens are at the New York Botanical Garden, being obtained when they acquired the herbarium of Princeton University in 1945.
Between 1890 and 1892, Dusén collected nearly 560 leaf fossils preserved in basalt in the vicinity of Mount Cameroon on the west coast of Cameroon. Later, these fossils were studied by the German paleobotanist Paul J. Menzel (1864-1927).
His botanical specimens are at the New York Botanical Garden, being obtained when they acquired the herbarium of Princeton University in 1945.
Honours
More than 200 species were named in his honour, including:- (AcanthaceaeAcanthaceaeThe family Acanthaceae is a taxon of dicotyledonous flowering plants containing almost 250 genera and about 2500 species....
) Acanthus dusenii C.B.Clarke - (Acanthaceae) Justicia dusenii (Lindau) Wassh. & L.B.Sm. in Reitz
- (AnacardiaceaeAnacardiaceaeAnacardiaceae are a family of flowering plants bearing fruits that are drupes and in some cases producing urushiol, an irritant. Anacardiaceae include numerous genera with several of economic importance. Notable plants in this family include cashew , mango, poison ivy, sumac, smoke tree, and marula...
) Trichoscypha dusenii Engl. - (AnnonaceaeAnnonaceaeAnnonaceae, also called the custard apple familyis a family of flowering plants consisting of trees, shrubs or rarely lianas.With about 2300 to 2500 species and more than 130 genera,...
) Guatteria dusenii R.E.Fr. - (ApiaceaeApiaceaeThe Apiaceae , commonly known as carrot or parsley family, is a group of mostly aromatic plants with hollow stems. The family is large, with more than 3,700 species spread across 434 genera, it is the sixteenth largest family of flowering plants...
) Azorella dusenii H.Wolff - (Apiaceae) Centella dusenii Nannf.
- (Apiaceae) Trachymene dusenii (Domin) B.L.Burtt
- (AspleniaceaeAspleniaceaeThe Aspleniaceae is a family of ferns, included in the order Polypodiales or in some classifications as the only family in the order Aspleniales....
) Asplenium dusenii Luerss.