Papers by Jerzy Zielinski
Dendrobiology, Nov 2, 2015
Dendrobiology
Thuja ×soeegaardii, a hybrid of Th. plicata Donn ex D.Don and Th. standishii (Gordon) Carrière, i... more Thuja ×soeegaardii, a hybrid of Th. plicata Donn ex D.Don and Th. standishii (Gordon) Carrière, is described as a new nothospecies from the Kórnik Arboretum, Poland, based on plants obtained in 1988 from the Botanical Garden in Gothenburg, Sweden. The hybrid was found for the first time at the Hørsholm Arboretum, Denmark, in 1938, among seedlings grown from seeds collected from Thuja standishii. Plants grown from rooted scions of this hybrid were planted in several places within the Hørsholm Arboretum. Soon, the hybrid plants were gifted to the Botanical Gardens in Copenhagen and Gothenburg as well to the Poulsen’s Plant Nursery in Kvistgård. In 1967 seedlings were sent from Kvistgård to the National Arboretum in Washington, where one of them developed into a particularly showy, lush and vigorous plant characterized by a dense, narrow, conical crown. The offspring obtained from rooted scions turned out to be very drought and wind-resistant, especially suitable for the formation of ...
Phytologia Balcanica, 2007
Abstract. The chromosome numbers of 22 woody plants from 25 populations in the Bulgarian flora ar... more Abstract. The chromosome numbers of 22 woody plants from 25 populations in the Bulgarian flora are reported: Acer monspessulanum, A. tataricum, Alnus glutinosa, Betula pendula, Celtis glabrata, Euonymus europaeus, Ligustrum vulgare, Paliurus spina-christi, Populus nigra, ...
Rose hips are a valuable source of many pharmacologically active compounds and they also contain ... more Rose hips are a valuable source of many pharmacologically active compounds and they also contain nutrients, including high quality fatty oil. The aim of the study was to determine the variability in the content of oil and main fatty acids in hips of all native rose species of the section Caninae. An attempt was also made to evaluate the taxonomic value of the compounds under consideration. In the investigations, 48 samples representing 11 taxa were used. These species were as follows:
This paper presents the results of a study on the effect of air drying (at a room temperature) an... more This paper presents the results of a study on the effect of air drying (at a room temperature) and freeze drying on the content of flavonoids, β-carotene and organic acids in total weight of hips (hypanthia and achenes) of roses from the section of Caninae DC. em. Christ. The obtained results show a significant effect of drying conditions on the content of β-carotene and organic acids. In the lyophilized material more organic acids were found, but less β-carotene, than in the rose hips dried at a room temperature. The largest differences were noted in the case of ascorbic acid. Its content in the lyophilizates was on average 5 times higher than in the air-dried hips and it was on average as much as 1.225 g/100 g of dry weight (DW). The amount of citric acid was higher by only 10%, on average. Large differences were also found for β-carotene. Its content in the freeze-dried material, compared to the air-dried rose hips, was on average lower by 74 mg/100 g DW (43%). In the case of flavonoids, the obtained results were ambiguous.
Polish Botanical Journal, 2001
Micromeria browiczii, sp. nov. belonging to Micromeria Benth. sect. Micromeria, is described as a... more Micromeria browiczii, sp. nov. belonging to Micromeria Benth. sect. Micromeria, is described as a species new to science. It occurs near coastal cliffs on Zakinthos, the Ionian island nearest the Peloponnese in southern Greece. It is a morphologically well-defined species, distinguishable by its neat revolute leaves and dense greyish indumentum.
Thuja occidentalis and T. plicata belong to alien trees most frequently cultivated in Europe. Mor... more Thuja occidentalis and T. plicata belong to alien trees most frequently cultivated in Europe. Morphologically they differ significantly from each other and their natural ranges are geographically isolated, hence the taxonomic status of both taxa has never been questioned. In cultivation, however, these species are often very difficult to distinguish so speculations appeared that they can hybridize with each other. Reports about their hybrids growing in the Kórnik Arboretum, Poland, have been delivered several times; for the first time in 1933, then in 1957 and in 1981. In the latter publication, based on those hybrids, a new nothospecies Thuja ×plicatoides was described. That name, however, was not validly published, because its Latin diagnosis was limited only to a few words and no mention was made of how the hybrid differed from its parental species. The analysis of numerous arborvitae specimens growing in the Kórnik Arboretum, and in many other places in Poland, has shown that th...
Pink-flowered locusts occurring in the wild have been stated in about 20 places in western Poland... more Pink-flowered locusts occurring in the wild have been stated in about 20 places in western Poland. On the basis of detailed analysis of numerous herbarium specimens from natural localities they have been identified as Robinia viscosa Vent. and R. ×ambigua Poir. The former is represented by var. hartwigii (Koehne) Ashe, while the latter by numerous morphologically different nothomorphs combining characteristics of the parent species – R. viscosa and R. pseudoacacia L. Some of the intermediate plants are probably segregates and backcrosses with the black locust. Both taxa seem to be fully established locally, however, they reproduce mainly vegetatively, so it seems unlikely that they will become more widely invasive. Numerous images are provided to facilitate the identification of Robinia species and their hybrids.
Based on field research in south-central Poland, supplemented with a review of herbarium material... more Based on field research in south-central Poland, supplemented with a review of herbarium materials, we identified a stable bramble biotype with a range large enough (190 km distance between the outermost stands) to be described as a new regional agamic species, Rubus kaznowskii sp.nov. It belongs to the series Subthyrsoidei (sect. Corylifolii). Although R. kaznowskii has a unique combination of features, it can be potentially mistaken for R. gothicus. It differs from the latter species in many aspects, including: pruinose primocanes, denser indumentum of the abaxial leaf surface, and more curved prickles on the petiole. R. kaznowskii has mainly been observed on rusty soils, in habitats of mixed coniferous and mixed broadleaf forests, usually in sunny places, along forest margins and roads, in clearings and roadside thickets.
Based on field research in south-central Poland, supplemented with a review of herbarium material... more Based on field research in south-central Poland, supplemented with a review of herbarium materials, we identified a stable bramble biotype with a range large enough (190 km distance between the outermost stands) to be described as a new regional agamic species, Rubus kaznowskii sp.nov. It belongs to the series Subthyrsoidei (sect. Corylifolii). Although R. kaznowskii has a unique combination of features, it can be potentially mistaken for R. gothicus. It differs from the latter species in many aspects, including: pruinose primocanes, denser indumentum of the abaxial leaf surface, and more curved prickles on the petiole. R. kaznowskii has mainly been observed on rusty soils, in habitats of mixed coniferous and mixed broadleaf forests, usually in sunny places, along forest margins and roads, in clearings and roadside thickets.
Kłopotliwe derenie-Cornus alba L. i C. sericea L. (Cornaceae). Dwa gatunki czy jeden? Troublesome... more Kłopotliwe derenie-Cornus alba L. i C. sericea L. (Cornaceae). Dwa gatunki czy jeden? Troublesome dogwoods-Cornus alba L. and C. sericea L. (Cornaceae). Two species or one?
Petasites anapetrovianus (Asteraceae) is described as a new species endemic to Mt Peristeri in S ... more Petasites anapetrovianus (Asteraceae) is described as a new species endemic to Mt Peristeri in S Pindos, Greece. It resembles P. paradoxus from the Pyrenees, Alps and Eastern Carpathians with southward extensions to Slovenia, Croatia (Velebit Mts) and Central Bosnia (Mt Vlasic) but can be easily distinguished by its leaf margins which are more deeply and acutely dentate-lobed. P. kablikianus has almost similar leaf margins with 3-5 lateral veins bordering the sinus but its leaves are glabrous above and beneath at maturity except for some short hairs on the veins. The new species is geographically isolated.
Phytologia Balcanica: International Journal of Balkan Flora and Vegetation, 2012
Phytolacca esculenta, Celtis tournefortii, Parthenocissus inserta, and Prunus serotina are report... more Phytolacca esculenta, Celtis tournefortii, Parthenocissus inserta, and Prunus serotina are reported for the first time from Bulgaria, while the occurrence of Salix viminalis in the country has been definitively confirmed. The first record on invasive spreading of P. serotina in Bulgaria is presented.
Biodiversity Research and Conservation, 2014
Wax layer formation accompanies the processes of epidermis and cuticle formation. To examine thes... more Wax layer formation accompanies the processes of epidermis and cuticle formation. To examine these changes, observationsalong current-year long shoots of four woody species (Acer negundo, A. rufinerve, Gymnocladus dioica, and Gingko biloba) were made. Long shoots are suitable objects for such observations, because from the same stem, several samples can be obtained that represent a well-defined sequence of fragments of different ages. The data that were obtained from different and sometimes distant stem regions suggest that epicuticular wax crystals appear on the stems very early and quickly, since they are found near the stem apex during intensive plant growth. This was confirmed for the four examined species. Some differences, however, were noted. Very rapid production of prominent wax crystals was observed in stems. In an experiment involving mechanical wax removal from the A. negundo stem surface and subsequent analysis of the surface after several days via scanning electron mic...
The indumentum of P. alba, P. tremula and their hybrid (P. ×canescens) is discussed in detail and... more The indumentum of P. alba, P. tremula and their hybrid (P. ×canescens) is discussed in detail and illustrated by scanning electron microscope and light microscope micrographs. Special attention is given to the hairiness of stems and leaves and to the diagnostic value of hairiness in distinguishing the grey poplar from its parent species. Presence or lack of hairs on leaves and stems, their density and their persistence are very useful features in distinguishing the taxa. Short shoot leaves of P. alba are usually described as initially densely white tomentose, but become glabrous or glabrescent. From our observations, it appears that the abaxial leaf surface of the white poplar remains hairy during the whole life span of the leaf. Hairiness does not disappear, but changes with time; arachnoid hairs become squeezed and pressed together until they finally form a very thin shiny layer on the leaf surface. In late summer, the indumentum becomes thinner and leaf blades seem to be glabrous, although hairs are still visible when using a strong magnifying glass. This feature allows easy distinction between P. alba and the similar P. ×canescens, the leaves of which are loosely arachnoid-tomentose when young and become fully glabrous or subglabrous when mature. Due to the presence of arachnoid hairs, the grey poplar can usually also be distinguished from its second parent, P. tremula. However, because of the introgression between the poplars, all possible features should be taken into account in diagnosis, especially the shape and indumentum of terminal adult leaves of long shoots and/or stronger suckers. In P. tremula, such leaves are usually broadly ovate, cordate at the base, irregularly serrate, glabrous or hairy, but never with long arachnoid hairs. In P. alba, the upper leaves of long shoots and suckers are deeply lobed, serrate and densely white arachnoid on the abaxial side, while in P. ×canescens they are serrate or shallowly lobed, rather loosely covered with arachnoid hairs and greenish-grey.
Results of anatomical studies on the developing pericarp of selected wild roses are presented. Us... more Results of anatomical studies on the developing pericarp of selected wild roses are presented. Using SEM and CLSM, the changes in the pericarp structure of 5 species have been observed during its formation, from the flowering stage to fully ripe achenes. In the morphological development of the pericarp of Rosa species two main phases can be distinguished: the phase of intensive growth of the pericarp during which the fruit achieves its final shape and volume, and the subsequent phase of pericarp ripening when no significant morphological changes in the pericarp occur. Similarly, in the process of the anatomical development of the pericarp two phases are noticeable, however, during both stages, great internal changes proceed in the fruit. The first phase consists of intensive cell divisions and enlargement, gradual thickening of cell walls and formation of all pericarp layers. Due to these changes, the pericarp achieves its final anatomical structure. The second phase, involving the pericarp ripening, is manifested in the modification of cell walls, mainly by their quick thickening, but first of all by their lignification. The lignification of pericarp cell walls begins in the inner endocarp; it proceeds in the outer endocarp, later in mesocarp and finishes in the hypodermal cells of the exocarp. The epidermal cells remain alive the longest and their walls do not (or hardly) become lignified. The death of all cells finishes the pericarp ripening.
This paper presents the results of extensive fi eld research and herbarium studies on the occurre... more This paper presents the results of extensive fi eld research and herbarium studies on the occurrence of Rubus L. species in southeastern Lower Silesia (SW Poland). It is the area of the greatest accumulation of Rubus species in Poland, where 61 species (about 2/3 of all species growing in Poland) were documented; 28 species were found there for the fi rst, and two appeared new to science. The distribution and routes of migration of particular species are discussed.
Dendrobiology, 2014
This paper describes, illustrates, and maps a new regional bramble species occurring in the Myśli... more This paper describes, illustrates, and maps a new regional bramble species occurring in the Myśliborskie Lake District in NW Poland. It represents the series Mucronati, which until now has never been recorded in this part of Europe. Locally it is the common plant and usually can be found in pine plantation established on former farmland.
Annales Botanici Fennici, 2008
Salix anatolica J. Zieliński & D. Tomaszewski sp. nova (Salicaceae) from central Turkey is descri... more Salix anatolica J. Zieliński & D. Tomaszewski sp. nova (Salicaceae) from central Turkey is described and illustrated. It is compared with the two morphologically closest species, S. pedicellata and S. pseudomedemii.
Uploads
Papers by Jerzy Zielinski