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This work presents the group features of 15 Trollius europaeus L. subsp. europaeus populations and the globe flower cluster structure characteristics from north-western Poland. The dependence between group features of T. europaeus populations and the soil chemical properties are presented.
The paper presents results of the first survey of nature monuments conducted after WWII in seven communes of the Szamotuły county: Duszniki, Kaźmierz, Obrzycko, Ostroróg, Pniewy, Szamotuły and Wronki. A total of 114 nature monuments were inventoried – single trees account for 76.3% of all monuments, while clusters of trees – 20.2%, respectively. A locality of Osmunda regalis, a cluster of Pinus mugo as well as two erratics are also monuments. A total of 384 trees of 25 species were inventoried. In case of single trees considered nature monuments the most numerous group is composed of English oaks (44 trees – 50.6%), while among tree clusters Scots pines predominate (201 trees – 67.7 %). The biggest number of monuments is found in state forests (57.9%) and former manor parks (21.9%). Plaques of Nature monument are placed on 54% trees ranked as monuments and 60.9% tree clusters, while only every eighth monument tree cluster bears the appropriate information plaque. Such a plaque was also placed on one erratic. The most impressive tree in the analysed county is a London plane from Pożarów, with a circumference of 7.15 m.
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This paper presents results of floristic investigation in the town Łeba. In 2002-2004 and 2006 vegetation seasons 66 interesting and rare vascular plants were found. Among them there are 31 species protected by law (21 strictly and 10 partially) (Rozporządzenie… 2004) and 7 (Drosera anglica, D. intermedia, D. rotundifolia, Dryopteris cristata, Linaria odora, Lycopodiella inundata and Salsola kali) are included in “Red Lists” of threatened vascular plants in Poland, Western Pomerania and Wielkopolska (Zarzycki and Szeląg 2006, śukowski and Jackowiak 1995). 22 species belong to the group of threatened species in the scale of the Gdańskie Pomerania (Markowski and Buliński 2004). According to “Red List” one of them is endangered (EN) – Lycopodiella inundata; 11 species are vulnerable (VU) – Cymbalaria muralis, Drosera anglica, D. intermedia, Epipactis atrorubens, Erica tetralix, Glaux maritima, Linaria odora, Myrica gale, Nepeta cataria, Salsola kali and Triglochin maritimum.
The influence of NPK fertilization on plant growth and roots yield of Gypsophila pankulata and Gypsophila repens was investigated. The nutrients were applied in different proportions. The health state of Gypsophila was also analyzed. The pathogens isolated from plants showing the diseases symptoms represented eight species: Alternaria dianthicola Neergaard; Fusarium avenaceum (Fr.) Sacc.; Fusarium culmorum (W. G. Smith) Sacc.; F. equiseti (Cola) Sacc.; F. oxysporum Schlecht., Snyder et Hansen; F. sambucinum Fuck; Phytophthora sp. de Bary; Rhizoctonia solani K. Fusarium oxysporum and other species of fungi were isolated from Gypsophila paniculata, whilst from Gypsophila repens only Fusarium oxysporum was obtained.
Grasslands in the Kulawa river valley (ca. 10 ha) were subject to land improvement in the 19th century, and remnants of the hydrotechnical system and overgrown ditches are still present. This study aims to: (1) evaluate the present meadow ecosystems; (2) predict their changes under the influence of the planned restoration of the hydrotechnical system and (3) compare results of various methods: phytoindication, phytosociological, floristic, and principal component analysis. The applied methods complemented one another. The devastation of the hydrotechnical system and the lack of utilization of the grasslands have led to either drying or waterlogging of the soil, and to changes in vegetation. The plant communities that have developed there represent the intermediate stage of regressive succession, and belong to the orders Arrhenatheretalia, Molinietalia, and the class Phragmitetea. Particularly the patches growing on relatively dry, strongly decomposed peaty soil have lost the characteristics of damp meadows. Meadow species have declined there, and nitrophilous species have replaced them. Only a local depression without outflow, which was earlier drained, is now waterlogged again, with a mosaic of calcareous fen, meadow, and marsh vegetation, including large populations of 11 species that are rare, protected, or listed as indicator species for the Natura 2000 habitat 7210*. Results of this study indicate that the present conditions in the waterlogged depression should be preserved. In contrast, the dry patches should be irrigated and subject to extensive farming.
Phenological observations at the Botanical Garden of the Adam Mickiewicz University in Poznań were conducted on Syringa komarowii, S. meyeri, S. microphylla, S. oblata, S. reticulata, S. tomentella and S. wolfii. These observations showed the longest foliation phase in the case of S. oblata and S. meyeri, while the longest flowering phase was recorded in S. reticulata, S. microphylla and S. wolfii. Additionally, the longest period of anthesis (i.e. the period from the moment when 25% flowers bloomed to the time when 75% were out of bloom) was observed in S. oblata and S. microphylla. All examined shrubs, except for S. oblata, set fruits, which dispersal was extended to the next year (except for S. komarowii). In terms of decorative value suitable for green areas the most valuable species were S. komarowii, S. reticulata, S. meyeri, S. microphylla and S. oblata, with the three latter being the most showy shrubs in terms of autumn foliage. Moreover, S. komarowii was exceptional among the analysed species due to its large, attractive leaf blades. This lilac, together with S. meyeri, was also characterised by the most decorative inflorescences. Thanks to their stronger growth in comparison to the other species, S. komarowii, S. oblata and S. reticulata are best suited for large gardens, whereas S. meyeri and S. microphylla will prove most suitable for small gardens. All the recommended shrubs show good drought resistance.
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