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A new stand of H. pilosum, a species not reported before from the territory of Poland, was found in the Polish Western Tatra Mts. It grows in numerous stands on limestone rocks on the slopes of Upłaziańska Kopka, at ca. 1400 m a.s.l. Moreover, typical form of this species, collected in the Polish Western Tatra Mts, was also found in herbaria of KRA and KRAM. These data indicate that H. pilosum is a widespread species in the described region but it was unrecognized from H. villosum so far.
A new stand, formed by some fifty individuals of Ambrosia artemisiifolia L., an invasive plant of alien origin, was discovered at the Katowice railway station (southern Poland), in 2011. Two years later, the stand (increased to more than 160 individuals in the meantime) was re-visited, phytosociological survey was made, and four soil cores (5 cm deep and 80 cm² surface area, each) were taken for seed bank studies. The phytosociological sampling revealed 28 co-occurring vascular species, most of them representing hemicryptophyte and geophyte life forms. According to Ellenberg's values, the species pool indicated sunny (L7 and L8 species dominating) and semi-dry (mainly F4 species) habitat for the common ragweed population, whereas Zarzycki's soil granulometric data reflected coarse-grained soil. Albedo of the soil was lower than that of the vegetation thus sparsely vegetated sites were considered as heat accumulating microhabitats that might support establishment of the thermophilic A. artemisiifolia. During soil seed bank analysis a high number of naturally opened fruits (dehiscent achenes) were found (718.75 per m²) most probably indicating frequent germination in previous years. Greenhouse germination tests proved successful germination of 125 individuals per m², which was considered enough to maintain the A. artemisiifolia stand at the station. The results call attention to a newly discovered, established population with increasing demography of A. artemisiifolia, a highly allergenic introduced weed of Poland.
New faunistic records concerning 45 species of the family Coccinellidae in Poland are given. The occurrence of Scymnus femoralis (Gyllenhall), previously reported from Poland without a precise locality, is confirmed on the basis of new findings from four regions.
The authors discuss three localities of Orthetrum brunneum in northern Poland (54°29'—54°48’ N, 18°15'—18°33' E). This is the first data from Poland from the area above 54° N, situated over 1.5 degree of latitude towards the north than the sites known so far. The distribution of the species in northern part of Central Europe is also analyzed.
Brachygluta klimschi HOLDHAUS found in the Bieszczady Mts. is reported as new to the Polish fauna and to the Eastern Carpathians. The current knowledge of distribution of Pselaphinae in Poland is discussed.
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