In 1986 R. Lenzenweger investigated the desmid flora of the “Schwarze Lacke” in Austria. In 2021 the present author visited the same location again and examined the differences in species composition after 35 years. Some in Belgium rare species are discussed.

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Desmidiologische Mededelingen
Nederlandse Sieralgenwerkgroep

L. Vaes. (2021). Sieralgen in de Schwarze Lacke, Gerzkopf, 35 jaar na Lenzenweger. Desmidiologische Mededelingen, 7, 8–11.