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<em>Ascochyta chaerophylli</em> Bres. and <em>Ramularia vallisumbrosae</em> Cavara are reported as new in Poland. <em>Passalora bupleuri</em> (Pass.) U. Braun on <em>Anthriscus sylvestris</em> (L.) Hoffm. is a new fungus/host combination and ten other rare species are recorded from new localities in the country.

<p>The <em>Ramularia </em>species represent a big and interesting group among parasitic Hyphomycetes. In Poland have been collected so far 115 species: one on fern, three on 5 species of rust fungi and the remaining ones on angiosperms (on 304 species belonging to 38 families). The most common are: <em>R</em><em>. geranii </em>var. <em>geranii</em>, <em>R. grevilleana </em>var. <em>grevilleana</em>, <em>R. inaequale </em>and <em>R. urticae</em>. But more than 40% of all the species occur very seldom (they are known from 1-5 stands). The following examples be- long to this group: <em>R. asplenii</em>, <em>R. asteris</em>, <em>R. keithii</em>, <em>R. minutissima </em>and <em>R. rhaetica</em>.</p><p>The biggest number of parasitic species are noted on the representatives of <em>Asteraceae </em>(17 species), <em>Scrophulariaceae</em><em> </em>(9), <em>Rosaceae </em>(7) and <em>Polygonaceae </em>(7).</p><p>The best explored regions in Poland are situated in the south and south-east part of the country: Kraina Karpat Zachodnich, Kraina Południowomazowiecko-Podlaska and Kraina Dolnośląska.</p><p>The <em>Ramularia </em>species are facultative saprotrophs. Anamorphs parasite on host plants and fungi, but known teleomorphs, belonging to <em>Mycosphaerella </em>genus, develop on plants remains. The vegeta- tive season indicates their occurrence limits. They start to grow in April, the biggest number of spe- cies are collected in summer and the end of vegetation in November, is the signal to stop producing spores. At that time they form sclerotia, perithecia or pass the winter as mycelium and conidia.</p><p> </p>

<i>Melampsoridium hiratsukanum</i> S. Ito was found on leaves of <i>Alnus incana</i> for the first time in Poland. Its description, illustration and distribution are given.

A list of species and the distribution of the members of Plasmopara (Chromista, Peronosporales) on Geranium spp. in the Tatra National Park (Western Carpathians) biospheric reserve are given. Three fungal species parasitizing 3 plant species were recorded in the area. Plasmopara praetermissa is a species new to Poland and Slovakia.