Pteridologists

Gualterio Looser Schallemberg (September 4, 1898, Santiago – July 22, 1982) was a Chilean botanist and engineer of Swiss parentage. He owned a factory that made agricultural implements.
In 1928 Looser joined the American Fern Society, and started to publish papers on the pteridophytes of Chile. His herbarium containing ca. 8000 specimens was given to Conservatoire et Jardin botaniques de la Ville de Genève.

Elias Magnus Fries (15 August 1794 – 8 February 1878) was a Swedish mycologist and botanist. He is sometimes called the "Linnaeus of Mycology". In his works he described and assigned botanical names to hundreds of fungus and lichen species, many of which remain authoritative today.