XVI International Botanical Congess

SEM study of 6 Scrophulariaceae genera: Scrophularia, Antirrhinum, Linaria, Veronica, Digitalis, Pedicularis was held. 2 nectary types were revealed: receptacular nectary presented by nectary disc not coalescent with ovary, and ovarial nectary cylinder coalescent with it. Both variants can be found in both subfamilies. Nectar secretion can happen through stomata, epidermal cell walls and cuticle. Flowers possessing zygomorphic nectary have many stomata on the spreading part of the nectary, facing either spur or swelling on the lower part of the corolla. Nectar can be stored in this structures. Stomata amount on the nectary surface is connected with nectary storage. Protected nectar helps the plant to attract pollinators. Structures protecting the nectary are f.e. trichoms in the base of the filament. Further nectary study can be perspective to reveal their systematic significance and biological role.