In the collection of the Sybir Memorial Museum is a herbarium brought to Poland by Jozef Krypajtis. It consists of 102 pages and contains specimens of some 130 species of plants found in the vicinity of Vorkuta, ranging from seaweeds, fungi and mosses to seed plants.
The full information in Polish is here: https://swiatsybiru.pl/pl/flora-workuty-zielnik-piotra-adasia/