Argentinian botanist (1927-2009).
Gabriela Gustava Hässel de Menéndez (15 October 1927 – 4 July 2009) was an Argentine bryologist who worked in liverworts and hornworts. Originally a botany professor at the Faculty of Pharmacy and Biochemistry, University of Buenos Aires, she left to become a National Scientific and Technical Research Council (CONICET) researcher and was head of the Bernardino Rivadavia Natural Sciences Argentine Museum's cryptogamy division from 1962 until 2000. She was a 1962 Guggenheim Fellow and received a 1983 Konex Award.