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Kitaibelia vol. 3 – no. 2. (1998) p.349-351.
HPTLC-vizsgálatok magyarországi Umbilicaria zuzmófajokon
Farkas Edit – Lőkös László – Mázsa Katalin
Representatives of the genus Umbilicaria are very rare in Hungary: U. deusta, U. hirsuta (earlier as U. grisea), U. polyphylla and U. cylindrica (as U. erosa, an unpublished record from the Visegrád Mts).
U. hirsuta was regarded as U. grisea due to a nomenclatural problem. U. hirsuta var. protomatrensis was kept under the name U. grisea f. papyria Ach. According to POSNER et al. (1992) the occurrence of umbilicaric a-cid is characteristic for U. grisea, while gyrophoric and lecanoric acids are produced by both species. The BP specimens of U. grisea f. papyria investigated by POSNER et al.(1992) proved to be U. hirsuta var. papyria.
During our HPTLC investigations only the single spot of gyrophoric and lecanoric acids was possible to detect in each sample. Umbilicaric acid in question should be studied by other methods (e.g. HPLC) also used by Posner et al. However, all specimens investigated belong to the genus Umbilicaria. Dermatocarpon moulinsii (mentioned by KISZELY 1968 and VERSEGHY 1965, 1994) and D. biennense proved to be misidentifications, they do not occur in the Hungarian lichen flora.