Per Karl Hjalmar Dusén

Per Karl Hjalmar Dusén
Per Karl Hjalmar Dusén
	Per Dusén, first from the left
Born	1855
Died	1926
Citizenship	Sweden
	Scientific career
Fields	botany
Author abbrev. (botany)	Dusén

Per Karl Hjalmar Dusén (1855–1926) 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. During his expeditions to Greenland, he visited Disko Island to catalogue the variety of flowering plants, horsetails and ferns.

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:

(Acanthaceae) Acanthus dusenii C.B.Clarke
(Acanthaceae) Justicia dusenii (Lindau) Wassh. & L.B.Sm. in Reitz
(Anacardiaceae) Trichoscypha dusenii Engl.
(Annonaceae) Guatteria dusenii R.E.Fr.
(Apiaceae) Azorella dusenii H.Wolff
(Apiaceae) Centella dusenii Nannf.
(Apiaceae) Trachymene dusenii (Domin) B.L.Burtt
(Aspleniaceae) Asplenium dusenii Luerss.
(Teiidae) Salvator duseni Lönnberg, 1910[1]
Dusén Fjord in NE Greenland.[2]

gollark: * would be

gollark: If they were actually working to improve citizens' lives and whatever, and not just retain power, then accepting more aid and whatnot with a risk of having the government be replaced is probably better than trying to work on nukes.

gollark: ... to deter *what*?

gollark: The best way to, you know, stop people starving and all would probably be to... reconcile with other countries, be less authoritarian, and accept aid.

gollark: They probably could do better.

References

Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. ("Dusen", p. 78).
"Catalogue of place names in northern East Greenland". Geological Survey of Denmark. Retrieved 16 September 2019.
IPNI. Dusén.

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[1] Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. ("Dusen", p. 78).

[cat-2] "Catalogue of place names in northern East Greenland". Geological Survey of Denmark. Retrieved 16 September 2019.

[3] IPNI. Dusén.