Abstract
<em>Verrucaria madida</em> is reported as new to Poland. Three other associated species, <em>V. aquatilis, V. hydrela</em> and <em>V. rheitrophila</em>, are compared. The known distribution in Poland and the ecology of these freshwater species are presented.
Highlights
During studies on the lichen biota of the Wzniesienia Łódzkie Landscape Park (Central Poland) carried out by the second author, a very interesting body of material was found on submerged rocks in a watercourse
Individuals observed on the rocks belong to Verrucaria madida Orange species
The species was associated with V. aquatilis, V. hydrela, and V. rheitrophila in the study area
Summary
Krzewicka B., Hachułka M.: New and interesting records of freshwater Verrucaria in Central Poland. Verrucaria madida is reported as new to Poland. V. aquatilis, V. hydrela and V. rheitrophila, are compared. During studies on the lichen biota of the Wzniesienia Łódzkie Landscape Park (Central Poland) carried out by the second author, a very interesting body of material was found on submerged rocks in a watercourse. The species was associated with V. aquatilis, V. hydrela, and V. rheitrophila in the study area. Except V. aquatilis and V. rheitrophila, the species are recorded from Central Poland for the first time (Nowak 1967; Hachułka 2007). Springs of upland streams: Grzmiąca, Kamienna as well as Moszczenica and its tributary, Młynówka, lie in the park. The Grzmiąca and Kamienna are tributaries of the Mrożyca, whose springs are outside the park borders. The streams form the catchment area of the Bzura river and flow along incised valleys (from 2‰ to 4.5‰) in the spring section
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