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tom 58
EN
This article covers seventeen Polish arboreta, of which six belong to academic institutions, seven to the State Forestry Commission, three to local authorities and one is private. Seven are park arboreta, normally surrounding palaces or manor houses, however ten were set up in woodland, near forests, or on the sites of former forest nurseries. The article discusses the establishing of new arboreta, both in parks and woodland, issues regarding design, maintenance and the protection of collections as well as educational and popularisation. Particular emphasis is placed on the suitable choice of plants, maintenance both of appropriate records and long term observations and measurements as the basis for future academic work.
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tom 57
EN
new cultivar of Japanese Cedar is described and illustrated. It originated from seeds received in 1961 from Gadow Arboretum (E Germany) and was propagated by cuttings in 1978 and 1985. The maternal tree in Rogów was killed by frosts during severe winter of 1986/87. The newly described form differs from the type in having very short needles.
EN
The list of 46 self-sowing alien woody plant taxa in Rogów Arboretum is presented, which is an expantion of the list from 1992 when the first article on spontaneous regeneration of alien tree and shrub taxa in the Arboretum was published. Most of species described are rather infrequently found in Polish collections and are known to produce self-seedlings not capable of sexual reproduction, however Abies grandis can be included into group of plants that could produce seedlings capable of sexual reproduction.
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