Habitat: North-western Himalayas from Kashmir to Garhwal, from 1,000 to 3,500 m.
English: Himalayan Cedar, Deodar.Ayurvedic: Devadaaru, Suradru- ma, Suradaaru, Devakaashtha, Devadruma, Saptapatrika, Daaru, Bhadradaaru, Amarataru, Ama- radaaru, Daaruka, Devaahvaa, Surataru, Surabhuruha.Unani: Deodaar.Siddha/Tamil: Thevathaaram.Action: Bark—decoction is used internally as astringent, antidiarrhoeal and febrifuge. Essential oil—antiseptic (used in skin diseases).
The Ayurvedic Pharmacopoeia of India indicated the use of the heart- wood in puerperal diseases.The wood contains sesquiterpeno- ids; exhibits sapasmolytic activity. Alcoholic extract of the wood showed marked anti-inflammatory activity in mice; alcoholic extract showed antibacterial activity.The wood possesses diaphoretic, diuretic and carminative properties, and is used in fevers and in pulmonary and urinary disorders.Himalayan Cedarwood Oil contains two major sesquiterpenoids—alpha- and beta-himchalenes. Presence ofbu- tyric and caproic acids is also reported. The oil shows in vitro antibacterial and antifungal activity. It increases vascular permeability. Needles, on steam distillation, yield a volatile oil, rich in borneol and its esters. An alcoholic extract of the needles shows significant antibacterial activity against diptheria bacteria. The juice shows antiviral activity against tobacco mosaic virus and potato virus.The bark contains 8-C methyltaxi- foline, dihydroquercetin, 8-C methyl- quercetin, quercetin, sitosterol, and tannins 8.25%, non-tannins 6.95% (varies with the age of the tree). An alcoholic extract of the bark shows significant activity against diptheria bacteria; aqueous extract of the dried bark showed anti-inflammatory activ ity against acute and chronic inflammations. Aqueous extract of the bark is found effective in reducing sugar content of diabetic patient's urine and blood to normal levels.Dosage: Heartwood—3-6 g powder. (API Vol. IV.)