Helgi Jónsson (11 April 1867, Rangárvallasýsla – 1925) was an Icelandic botanist and phycologist.

He specialized in the research of marine algae and subarctic vegetation. During his career, he undertook many botanical trips throughout Iceland.[1]

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^{[permanent dead link]}. The Botany of Iceland, edited by L. Kolderup Rosenvinge & E. Warming, J. Frimodt, Copenhagen, and John Wheldon and Co., London; Vol. 1, Part 1, pp. 1–186. 1912.

The diatom Navicula jonssonii Østrup is named for him.

References

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