abstract the essential oil isolated from the aerial parts of phlomis bracteosa royle ex benth., collected from the pindari glacier area (phurkiya) at 3000-3200 m height of the himalayas was analyzed by a combination of gc, gc/ms and 1h- and 13c-nmr. thirty-four compounds representing 88.9% of the oil were identified. the major constituents were germacrene d (34.3%), sabinene (6.2%), germacrene d-4-ol (4.9%), linalool (4.8%) and -bulnesene (3.5%). the oil showed a high content of sesquiterpene hydrocarbons.