Lynge B 1928. Lichens from Novaya Zemlya. In Holtedahl O. Report of the Scientific Results of the Norwegian Expedition to Novaya Zemlya 1921. Oslo. 1-299.
The last mentioned plant was found on chalk, otherwise the plants were collected on hard rocks. There are but a few plants in my collection, but if botanists will pay special attention to this species, it will perhaps be found in many localities.
Ripe spores are always broad or even very broad; I have found some spores so broad as 16 X 12 µ; their size is (12-) 13-18 X 8-10 (-12) µ. Young or immature spores are narrower, often constricted at the middle.
Its thalline colour calls to mind the “diphyes” which shall be a Blastenia, according to TH. FRIES Lich. Scand. II pag. 395. MALME as well as VAINIO have suggested a comparison with that species. “Blastenia” diphyes has very small apothecia; it is especially characterized by its long arcuate pycnoconidia: 18-22 µ. In one of my plants (Kara Sea entrance) I succeeded in detecting fertile pycnides. The pycnoconidia were elliptical, 2-3 µ long, thus excluding the diphyes.
The reaction of the epithecium “KOH omnino immutatum” is almost incredible in a Caloplaca.In some of my plants from hard rocks a very faint tinge of violet was obtained with KOH, and in the last mentioned calcicolous plants the violet colour was very distinct.