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.