DEVELOPMENTAL AND ANATOMICAL STUDIES OF THE FLORAL NECTARIES IN TARAXACUM MONGOLICUM

Taraxacum mongolicum has a green tubular stylar nectary located at the base of the style.The nectary,which lacks special vascular bundle,is composed of secretory epidermis and nectariferous tissue.Stomata are present in the epidermis and they have well-developed space under them.The nectary initiates from the superficial layer cells of the base of the style.During the development of nectary,the structure and content of cells change regularly.Pre-nectar is provided by the vascular bundle of the base of the style.Nectar formed in nectariferous tissue is secreted by the stomata.