Farkas, E., Kursinszki, L., Szőke, É. & Molnár, K. 2015. New chemotypes of the lichens Xanthoparmelia pulvinaris and X. subdiffluens (Parmeliaceae, Ascomycota). — Herzogia 28: 679–689.
New chemotypes of Xanthoparmelia pulvinaris and X. subdiffluens containing norstictic acid were identified among many of the Hungarian collections of these species using HPTLC and confirmed by LC-MS. The two species are characterised, the possible functional role of norstictic acid is briefly discussed and the importance of protecting populations with norstictic acid in nature is emphasized.