This research has been done on the riverside of the Žeimena. This territory belongs to the Pabrade town. After having done the research of flora of herbs on the riverside of the Žeimena in 2001 - 2004 from 43 families and 90 genera there have been inventoried 105 varieties Asteraceae (16), Rosaceae (12 varieties), Lamiaceae (8), Polygonaceae (6), Salicaceae (5), Apiaceae (5) in over families - less than 5 varieties. The varieties of herbs growing in Pabradės forestry are Vaccinium myrtillus, Vaccinium vitis-idaea, Filipendula ulmaria, Urtica dioica; Žeimenos forestry - Vaccinium myrtillus, Fragaria vesca, Achillea millefolium and Filipendula ulmaria; Magūnų forestry - Juniperus communis, Vaccinium myrtillus, Vaccinium vitis-idaea, Acorus calamus, Padus avium and Urtica dioica. According to active substances for rohich those herbs are being collected 26% of them belong to the essential oil group, 21% to the glucosidic group, 5% to the ferment group, 5% to the nucous group and 4% to the resinous group. Appreciate to the farm meaning 82% have genetic conseąuehce, 15% have local output and 2% have production consequence. In most cases herbs are collected from June till August because of actine substances concentrations in 65% of the herbs during that period of time. In this work has been established a fact that the same species of herbs in Žeimena, Pabradė and Magūnai forestries differ in their morphological and biological characteristics and efficiency, for example, Vaccinium... [to full text]