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The research was carried out within three forest-park complexes located in the south-western part of the Poznań city, which once had the status of ecological uses. The aim of the work was to inventory a dendroflora for the selection of trees with monumental dimensions. In addition, changes in the participation of monumental trees in local vegetation over the last 12 years had been analysed. During...
The aim of the work was to estimate the range of morphological variability of seeds of the Himalayan balsam (Impatiens glandulifera), from different sites within Poland. It was also verified whether there was a correlation between morphological variability of seeds and type of vegetation from which they originated. Additionally, the seed coat ultrastructure of this species was studied. Biometrical...
Pyrus ×myloslavensis is a hybrid with intermediate characteristics of leaves and fruits inherited from its parental species P. salicifolia and P. communis. The aim of this study was to determine whether these intermediate nature of this taxon would be visible in the pollen and seed anatomy and morphology. In addition, the authors evaluated self-compatibility and crossability based on the observation...
Achenes of roses were rarely studied and the studies were focused on anatomical research, mainly on pericarp structure and its development. We investigated the achene morphology by light- and scanning electron microscopy (LM and SEM) of 17 Rosa taxa from three sections (R. gallica from Gallicanae section, R. pendulina and R. rugosa from Rosa section, and R. agrestis, R. canina, R. canina var. corymbifera,...
During the last 10 years (2005–2014) the population of Epipactis palustris within the former ecological use “Kopanina 1” was observed five times. In subsequent years, on the area of 4400 m2 at least 1000 to more than 4000 ramets were noted. The ramets in generative phase of development always predominated. It might indicate good condition of the population. The highest density per unit of area was...
The object of the work was population of spiny restharrow (Ononis spinosa) growing within the previous ecological site “Kopanina I” in the south-western part of Poznań. In total 67 specimens were found on the area of 825 m2. About half of them were in phase of flowering. Most of plants grew in clusters. They were a component of the meadow plant community of Molinio-Arrhenatheretea class with different...
Celem pracy było zbadanie zmienności pyłku u czterech typów odmian lnu zwyczajnego. Zmierzono długość osi biegunowej i równikowej ziaren pyłku oraz określono ich kształt. Największe ziarna miała odmiana oleista, a najmniejsze – odmiany włókniste. Wartości współczynników zmienności cech były niskie. Analiza wariancji wykazała, że odmiany różniły się istotnie pod względem badanych cech. Cechy korelowały...
In recent years extensive attention has been given to the Rubus genus, but knowledge on the ecology of most of its species, including rhythmic development, is still insuffi cient. Such data may have practical applications, since blackberry species are economically important. The goal of the study was to analyse phenology and growth rate of vegetative and generative stems in 10 Rubus species of different...
Achene macro- and micromorphology and pericarp anatomy are described in four Polish species of Anemone (A. narcissiflora, A. nemorosa, A. ranunculoides, A. sylvestris). Biometric analysis showed that achene size varies greatly in all the studied species and is of limited diagnostic value. Three types of sculpture connected with the character of the indumentum were distinguished. The presence or absence...
Leaves from generative and vegetative shoots of Rubus capitulatus and R. kuleszae of Corylifolii section were investigated. The study was to demonstrate the variability of leaves of both types of shoots, and at the same time an examination on the contents of polyphenols and phenolic acids in their blades carried out. Selected blade traits, such as was: length, width, elongation, perimeter, dissection...
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