There are numerous and different uses of rosemary (Rosmarinus officinalis L.) essential oil (e.o.) and experimental results indicating which of the e.o. components is responsible for a specific biological activity. Consequently, it is worth to consider not only the seasonal variation of the the e.o. content but also the proportion of e.o. components that might vary according to season as well. Our aim was to determine the monthly variation in the e.o. composition, plant growth and e.o. yield of an almost continuously flowering rosemary natural population in a coastal Mediterranean environment, in order to understand the best utilization of e.o. according to the oil components detected by means of GC/MS along the different seasons. Alpha pinene ranging from 75.4 to 18.2% and eucalyptol from 15.6 to 3.5%, were the most represented components in all periods of samplings. Camphor and borneol increased in the samplings done after summer. Flowering occurred almost continuously except in the period from mid May to mid August. Production of e.o. was slightly affected by sampling period. The high concentration in alpha pinene, up to a level not recorded before according to the available literature, could be exploited for new pharmaceutical uses. The observation of leaves, stems and flowers by means of scanning electron microscopy, showed in all the examined plant parts the presence of glandular trichomes particularly numerous on leaves in the basal part of the adaxial lamina indicating the importance of leaves for e.o. production.

迷迭香（Rosmarinus officinalis）有许多不同的用途。L.）精油（eo）和实验结果表明，哪些eo成分与特定的生物活性有关。因此，不仅要考虑eo含量的季节性变化，而且还要考虑eo成分的比例可能随季节而变化。我们的目的是确定地中海沿岸环境中几乎连续开花的迷迭香自然种群的eo组成，植物生长和eo产量的月变化，以便根据通过以下方法检测到的石油成分了解eo的最佳利用：不同季节的GC / MS。在所有采样期间，α-pin烯的含量最高，为75.4％至18.2％，桉树油为15.6％至3.5％。夏季后的采样中樟脑和冰片增加。除5月中旬至8月中旬以外，几乎持续开花。eo的生产受采样时间的影响很小。αpin烯的高浓度，可以达到现有文献所未记录的水平，可以用于新的药物用途。通过扫描电子显微镜对叶，茎和花的观察表明，在所有被检查的植物部分中，腺毛的毛状体的存在，特别是在近轴层的基部的叶上，表明了叶对eo生产的重要性。αpin烯的高浓度，可以达到现有文献所未记录的水平，可以用于新的药物用途。通过扫描电子显微镜对叶，茎和花的观察表明，在所有被检查的植物部分中，腺毛的毛状体的存在，特别是在近轴薄板的基部的叶上，表明叶对eo生产的重要性。αpin烯的高浓度，可以达到现有文献所未记录的水平，可以用于新的药物用途。通过扫描电子显微镜对叶，茎和花的观察表明，在所有被检查的植物部分中，腺毛的毛状体的存在，特别是在近轴薄板的基部的叶上，表明叶对eo生产的重要性。o。生产。o。生产。