Composition of essential oil from an annual crop of Hyssopus officinalis grown in Indian plains

The plants of Hyssopus officinalis ssp. officinalis genotype raised through seeds sown iii early December 1997 flowered in May 1998. The essential oil yields obtained upon hydrodistillation of above ground parts, harvested in May, were 0.25% on fresh herbage weight basis and 1.18% on dry herbage wei ght basis. The GC and GC-MS analysis of the essential oil led to the identi fication of 21 compounds representing 95.6% of the oil, having seven monote rpene hydrocarbons (32.3%), five oxygenated monoterpenes (60.5%) one phenol (0.2%) and six sesquiterpene hydrocarbons (0.35%). The major constituents of the camphorous odoured oil were pinocamphone (49.1%) > beta-pinene (18.4 %) > isopinocamphone (9.7%). Copyright (C) 1999 John Wiley & Sons, Ltd.