Gualterio Looser Schallemberg (September 4, 1898, Santiago-July 22, 1982) was a Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

an botanist and engineer of Swiss parentage. He owned a factory that made agricultural implements.

In 1928 Looser joined the American Fern Society

American Fern Society

The American Fern Society was founded in 1893. Today, it has more than 1000 members around the world, with various local chapters.Willard N. Clute was the founder of the society, originally establishing it as the "Linnaean Fern Chapter."...

, and started to publish papers on the pteridophytes of Chile. His herbarium containing ca 8000 specimens was given to Conservatoire and Jardin Botanique Geneva.

Some taxa described by G Looser

• Boldea boldus (=Peumus boldus)
• Cryptocarya alba
  Cryptocarya alba
  Cryptocarya alba, the Peumo, is an evergreen tree that grows in Chile and Argentina from 33 to 40° southern latitude. It can live both in wet and as in dry conditions. Its distribution can reach up to 1500 meters above sea level. It measures up to 20 meters height and one meter diameter, with...
  
   (Molina
  Molina
  Molina is a Spanish, Portuguese, and Italian surname. It can possibly refer to:-A:*Alfonso Quiñónez Molina , President of El Salvador twice 1918–1927*Alfred Molina , English actor...
  
  )Looser
• Laureliopsis philippiana (Looser)Schodde as Laurelia
  Laurelia
  Laurelia is a genus of flowering plants included in the order Laurales, in the family Atherospermataceae. They are Evergreen fragrant laurifolia trees formerly in the Monimiaceae family....
  
  
• Sticherus squamulosus (Desv.) Nakai
  Takenoshin Nakai
  was a Japanese botanist.-External links:* * * by Yong Shik Kim and Mike Maunder from CURTIS'S Botanical Magazine, Royal Botanic Gardens, Kew, UK. Vol. 15: 141-146, 1998....
  
  var. gunckelianus (Looser)R. Rodr. et Ponce as Dicranopteris