Abstract
Techniques are described for the micro-analysis of the free volatile sesquiterpenes in plant tissue by direct-loading gas liquid chromatography. Evidence is presented for the accumulation of sesquiterpenes, not only in the external glandular trichomes, but also in specialized internal accumulatory cells. The morphology and development of these external and internal structures are described as seen under light and electron microscopy. Also, while the apical dome of the stem neither shows any specialized accumulatory structures nor contains any detectable sesquiterpenes, the second pair of primordial leaves has glandular trichomes and a sesquiterpene concentration approximately twelve times higher than that in any other part of the plant.
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