Lucyna Elżbieta Śliwa (born 20 February 1964) is a Polish lichenologist and mycologist known for her extensive work on the taxonomy and biogeography of the lichen genus Lecanora.

After receiving a Kosciuszko Foundation scholarship, Śliwa completed an internship at the University of Minnesota in 1991, collaborating with the renowned lichenologist Clifford M. Wetmore.

[2] Śliwa's doctoral research, supervised by Maria Olech, focused on investigating anthropogenic changes in the lichen biota of the Beskid Sądecki mountain range.

Śliwa has also proposed new nomenclatural combinations and contributed significantly to the understanding of lichen diversity and distribution in various regions, including Russia, Antarctica, Argentina, Bolivia, and Romania.

[2] Śliwa held the position of assistant professor at the Jagiellonian University from 2001 before moving to the W. Szafer Institute of Botany of the Polish Academy of Sciences in Kraków in 2003.

Śliwa is also a member of the editorial boards for several scientific journals, including Fragmenta Floristica et Geobotanica Polonica, Monographie Botanicae, Plant and Fungal Systematics, and Studia Nature.