Helgi Jónsson (11 April 1867,

Rangárvallasýsla Iceland was historically divided into 23 counties known as ''sýslur'' (), and 23 independent towns known as ''kaupstaðir'' (). Iceland is now split up between 24 sýslumenn (magistrates) that are the highest authority over the local police ( ...

– 1925) was an Icelandic

botanist Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...

and phycologist. He specialized in the research of

marine algae Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * M ...

and subarctic vegetation. During his career, he undertook many botanical trips throughout Iceland. The

diatom A diatom (Neo-Latin ''diatoma'') is any member of a large group comprising several Genus, genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of Earth's B ...

'' Navicula jonssonii'' Østrup is named after him.

Main works

* ''The marine algae of Iceland''. '' Botanisk Tidsskrift'' 25: 378–380. 1902–1903. * ''The marine algae of East Greenland''. '' Meddelelser om Grønland'' 30: 1-73. 1904. * ''The marine algal vegetation of Iceland''. 1912 '' The Botany of Iceland''

References

Helgi Jonsson 1867 births 1925 deaths Phycologists {{Iceland-scientist-stub