abstract the chemical composition of angelica glauca edqew (fam. apiaceae) root volatile, from various locations in alpine himalayas at different phenological stages of plant growth was investigated by using gc, gc/ms and spectroscopic techniques. terpene hydrocarbons (methyl octene, limonene, -phellendrene, -pinene), phthalides [(z)-3-butyli-dene phthalide (z)- and (e)-ligustilide] and citronellyl acetate showed large quantitative variations from flowering to dormancy stage and as well from different geographical locations.