ABSTRACT
This study aimed to describe the histo-anatomy of Tussilago farfara L. species from the Asteraceae family, with medicinal importance in Romania for the alternative treatment of respiratory diseases (asthma, laryngitis, cough, emphysema) and other disorders. The chemical composition of Coltsfoot includes more than 150 chemical substances (triterpenoids, sesquiterpenoids, alkaloids) with different medicinal proprieties (expectorant, antimicrobial, antitussive) and contraindications (pregnancy, lactation, hepatic disorders). The vegetal material used in this study was collected from the waterside of river Sireţel in the village Sireţel from Sireţel commune in Iaşi County. The cross-sections were performed manually through vegetative organs (rhizome, stem, and leaf) with the help of a hand microtome and a botanic razor. The structures of the sections were highlighted by double coloration (iodine green and ruthenium red), the observation was performed on a Novex microscope. The characteristics structures observed by us (epidermis, vascular bundles, trichomes, angular collenchyma, assimilating parenchyma, stomata, mesophyll) correspond with Toma and Rugină (1998) observations and descriptions.