Olga Fassatiová (1924-2011) was a Czech mycologist known for her work in the biology and ecology of saprophic fungi, including fungi on food, feed, and soils.

[1] From 1951-1991, she worked as a teacher and scientist in the Department of Botany at Charles University in Prague.

[1] There, she began the fungal culture collection at the university in 1964 and helped establish the Federation of Czechoslovak Collections of Microorganisms.

[1] She also described several fungi, including Acrodontium griseum, and authored over 60 journal articles and textbook chapters.

[1] The fungus Trichoderma fassatiovae was named in her honor.