[Histo-anatomical researches of two subspecies of Lavandula angustifolia Mill]. / Cercetari histo-anatomice privind doua subspecii de Lavandula angustifolia Mill.

ABSTRACT

AIM: The structure of the inflorescences of two subspecies of Lavandula angustifolia sL. angustifolia ssp. angustifolia and. L. angustifolia ssp. pyrenaica (D.C.) Guineat was studied to determine the range of variation in certain histo-anatomical characters. METHODS: The flower and leaf structure has been analysed on cross and superficial section using the usual techniques and methods applied in plant histo-anatomical research. RESULTS: In cross-section, inflorescence axis has a squared-shape contour, with four proeminent ribs. On the epiderme of inflorescence axis there are present stomata, trichoms and secretory hairs. The trichoms are pluricelullar and T-branched. The secretory hairs have a short pedicel and a uni-or bicellular head. CONCLUSIONS: The study revealed that there are only quantitative differences, referring to the degree of sclerification and lignification of mechanical elements and the size of the vascular bundles.