Search Results

You are looking at 1 - 4 of 4 items for

  • Author or Editor: D. Bartha x
  • Refine by Access: All Content x
Clear All Modify Search

Hungarian dendrological research (research of living woody plants) has more than 200 years old history; the first general work by János Keresztély Grossinger was published in 1797. Further basic works in our time yet are: Forest Botany by Lajos Fekete and Sándor Mágócsy-Dietz (1896); and the chorological work, Distribution of trees and shrubs of sylvicultural importance in the region of Hungarian State by Lajos Fekete and Tibor Blattny (1913). A few dendrologists and many botanists have helped to get better knowledge of Hungarian dendroflora. From the point of view of taxonomy, chorology and habitat — which are interested by field botanists — it can be said that knowledge is fairly heterogeneous. There are sufficient information about most of the rare (protected/endangered) woody plants (an about 50 species) and the important adventives, above all invasive trees and shrubs (an about 10 species). From these two groups beyond there are only few taxa which can be said thoroughly worked up and known (e.g. Castanea sativa, Cornus mas, Fraxinus spp., Quercus spp.). List of the dendrotaxa, hardly known in the abovementioned point of view is rich in species that are important for forestry or horticulture (e.g. Alnus glutinosa, Acer spp., Betula pendula, Corylus avellana and most of Salix spp.), supplemented with other species (e.g. Clematis vitalba, Colutea arborescens, Lonicera xylosteum, Padus avium, Sambucus nigra, Staphylea pinnata, Viburnum spp.).Followings can be asked from our field botanists: i) look for a specialist in cases of critical dendrotaxa; ii) a circumspect identification is necessary — especially in the case of leaves — by right of great number of samples from the adequate part of shoot; iii) keep in view frequent hybridization (e.g. in the case of Betula, Crataegus, Pyrus, Tilia), and frequent appearance of hybrids (e.g. Betula × rhombifolia, Cerasus × eminens, Salix × rubens); iv) appearance of interim forms are usually typical in the cases of species classified into aggregate species (e.g. Quercus petraea agg., Qu. pubescens agg.); v) take intraspecific taxa according to various ecological demands, area, morphological differences into consideration; vi) culture variations cannot be treat as an equal with the species (e.g. Populus spp., Salix spp.); vii) natural ↔ artificial area have to be separated; viii) lend a helping hand in getting taxonomical knowledge of hardly known dendrotaxa.

Restricted access

The author classified the species of the Hugarian dendroflora into a new life form system which was elaborated by using the following principles: scale of lignification, ramification and type of shoot system, duration and type of the leaves, reproductive ability from root-shoot. This life form system, which can be applicable for all the tree and shrub species in Europe apart from two palm species, contains 31 life form types, and are divided into two main groups. Phanerophytes can be classified into four main groups such as trees, shrubs, lianas and epiphytes while chamaephytes having two main types dwarf shrubs and sub-shrubs. The author identified the life form types for the 189 indigenous species of the Hungarian dendroflora, and the distribution of the life form types in the main habitat types. Relation between the distribution of the life form types of the Hungarian and the European dendroflora is also discussed.

Restricted access

The crown architecture of the trees has only researched in the last decades. In this respect Hallé’s study is very important (Hallé et al. 1978), in this they described 23 architectural models about tropical tree species. This kind of model can not use for trees, which are in the temperate zone, therefore Pfisterer and Roloff (2010) worked out another architectural models. This present study gives a classification about the architectural models and types of native, frequently cultivated alien tree and shrub species in the Pannonian Basin. We classified the species into 8 architectural models, within it are 17 different architectural types. Three architectural models (Attims, Leeuwenberg, Scarrone) and 5 architectural types (Aesculus, Cryptomeria, Syringa, Thuja, Tsuga) only contain alien species.

Restricted access

The checklist includes tree, shrub, dwarf shrub, woody liana and epiphyte species that occur or have occurred in Hungary except the settlements and other intensively utilised objects. 437 dendrotaxa were included and evaluated in this list. This means 281 species, 22 subspecies, 128 nothospecies and 6 nothosubspecies. Based on the indigenat, 260 native, 92 alien and 9 cryptogenic dendrotaxa live in Hungary, furthermore 54 cultivated dendrotaxa and 22 dendrotaxa with questionable occurrence. Analysing the invasive status of alien species, 19 invasive or being in the early stages of invasion, 12 naturalised and 61 casual dendrotaxa can be distinguished. According to residence time status, the number of archaeophytes is 16 and that of neophytes is 76. Of the 260 native dendrotaxa, 9 were extinct or presumably extinct. 44 dendrotaxa are considered to be proven endemic, and there are 8 subendemic. Of the 134 nothotaxa on the list, 14 are artificial and 120 are of natural origin.

Open access