Hans Haas (mycologist)

from Wikipedia, the free encyclopedia

Hans Haas (born November 5, 1904 in Karlsruhe , † April 16, 2003 in Seewald -Besenfeld, Baden-Württemberg) was a German mycologist . His botanical-mycological author's abbreviation is " H. Haas ".


Haas studied biology and other subjects at the University of Stuttgart (then still Technical University) from 1925 to 1929 , where he received his doctorate in 1932 with a thesis with Richard Harder entitled “The large ground-dwelling mushrooms in the forest formations of some areas of Württemberg”. With this work Haas is considered to be one of the founders of the ecology and sociology of mushrooms . In 1930 he married Margarete Haller, a fellow student with the same professional goal. Both submitted their dissertations on the same day. Professionally, Haas was initially a scientific assistant at the Technical University in Stuttgart and then a high school teacher. In addition to his professional activity, he researched the fungal flora and ecology of natural forests throughout his life. His assistantship ended in 1932. He then worked at various schools, including Bad Waldsee. After the war he was transferred to the Eberhard-Ludwigs-Gymnasium Stuttgart in 1952 . In 1959 he became a senior teacher and in 1966 a high school professor. From 1967 he was partially seconded to the Natural History Museum in Stuttgart for his scientific work. Here he built up a desiccate collection of mushrooms, which were supplemented by watercolors. In 1969 he retired. After the death of his wife in 1990, Haas moved to a retirement home in Seewald-Besenfeld in 1993. From there, even at the age of over ninety, he regularly traveled by public transport to Stuttgart to look after his collection. Haas is also known for publishing numerous books on mushrooms, including Die Pilze Mitteleuropas .

Since 1976 he has been honorary chairman of the German Society for Mycology .


A genus Haasiella of the Basidiomycetes is named after Hans Haas . The Stuttgart mushroom connoisseur Paul Holl discovered a mushroom in the city of Stuttgart, which Haas identified as Clitocybe venustissima Fries. A closer examination of this rare mushroom showed that it is better to place it in its own genus. Haas suggested the name Chrysomphalina for it. However, since he did not publish a Latin description for it, this name is invalid in the sense of the nomenclature rules. This in turn gave the two Czech mycologists F. Kotlaba and Z. Použar the opportunity to name the mushroom after Haas Haasiella and thus also to appreciate the findings of Haas. In 1994 he became an honorary member of the Society for Natural History in Württemberg .


  • Ulrich Kull: Hans Haas: 1904-2003 . Annual books of the Society for Natural History in Württemberg 159: 305-308, 2003.
  • Gerhard Kost: Obituary for our honorary chairman Dr. Hans Haas . Journal of Mycology 69: 155-166, 2003.
  • Ernst Dittrich: Obituary for the death of Dr. Hans Haas . Southwest German mushroom roundabout. 39: 59-60, 2003.
  • Helmut Herwanger: Upper Swabian botanists from five centuries . Annual books of the Society for Natural History in Württemberg 170, Part 2, 187–192, 2014 (photo p. 187).

Single receipts

  1. F. Kotlaba, Z. Použar: Haasiella, a new Agaric Genus and H. splendidissima sp. nov. Ceska Mykologie 20, 135-140, Taf. XIII, Tab. 62; 1966
  2. H. Haas: First discoveries of leaf mushrooms from southwest Germany . Switzerland. Magazine Mushroom Science 31 (1): 136-140, 1953
  3. ^ H. Haas: The systematic position of Clitocybe venustissima Fries . Magazine Mushroom Science 28: 12-13, 1962
  4. ^ Honorary members of the Society for Natural History in Württemberg

Web links