Kjeld Axel Holmen

Hypnum jutlandicum is a species of moss belonging to the family Hypnaceae. It is widely distributed in Europe and the Aleutian Islands but it is also found in other parts of the world. In a study of the effect of the herbicide Asulam on moss growth, Hypnum jutlandicum was shown to have intermediate sensitivity to Asulam exposure.

Festuca hyperborea also known as the boreal fescue, is a species of grass in the family Poaceae. This species is native to Greenland, Kamchatka, Krasnoyarsk, Labrador, Magadan, North European Russia, Northwest Territories, Nunavut, Québec, Svalbard, Yakutskiya, and Yukon. It is perennial and mainly grows in subalpine or subarctic biomes. Festuca hyperborea was first described in 1957.

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Nyholmiella is a genus of mosses belonging to the family Orthotrichaceae. Originally the two species were places in the genus Orthotrichum and in 1885 classified as a separate subgenus. Then in 1908 they were assigned to Stroemia, but this was deemed illegitimate and renamed to Nyholmiella named after Swedish botanist Elsa Nyholm.

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