Salix starkeana Willd. is a rare species of Polish flora. A new stand of this species consisting of approximately 300 specimens, has been found adjacent to the Wieprzec Reserve, in Central Roztocze. These plants occur on overgrown meadow belonging to the class Molinio-Arrhenatheretea, and on the periphery of an alder woodland.
The aim of the conducted experiments was to verify to what degree different lime species as well as other trees and shrubs may be potential host plants for oak slug sawfly. In the laboratory experiment a total of 45 plant species were tested, including 30 species and the taxa of lime. As a result of these studies significant information was obtained on which species may be seriously damaged by larvae of oak slug sawfly and resistant lime species were identified for potential use in green areas.
The polyphenols compounds: flavonoids, phenolic acids and tiinnins have been found in the water extracts of Gemmae Populi, Folium Populi, Folium Plantaginis lanceolatae and Herba Polygoni avicularis. The effects of water extracts on immunological reactivity of human and mouse lymphatic cells were examined in vivo and in vitro. Some of extracts caused significant enhancement of the ability of mouse and human lymphocytes to release angiogenic growth factors and increased the production of anti-SRBC 19S and/or 7S antibodies.
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