Szymczyk, R., Zalewska, A., Szydłowska, J. & Kukwa, M. 2015. The lichen family Parmeliaceae in Poland. IV. The genus Punctelia. — Herzogia 28: 556–566.
A study of the genus Punctelia in Poland revealed that only two species, P. jeckeri and P. subrudecta, occur there. Both species have been more commonly found in the southern Poland than in other parts of the country, and are almost absent in the west. Most records of both taxa originate from the 1980s and 1990s. This is most likely the result of intensification of lichenological inventories in this period, but the impact of climate changes on the species frequency cannot be excluded. P. subrudecta is threatened in the country and treated as vulnerable in the red list of lichens in Poland and the same status is proposed for P. jeckeri for the next edition of the red list. The distribution of both species, their morphology, secondary chemistry and habitat requirements, are discussed. Notes on similar taxa are presented.